Rat TNF-α(Tumor Necrosis Factor Alpha) ELISA Kit

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This kit is based on Double antibody-Sandwich ELISA detection method and takes 4h assay time. The microplate provided in this kit has been precoated with anti TNF-α antibody. Add standard and properly diluted sample into relevant well respectively. After incubation, wash unbound components. Add biotinylated detection antibody. Then, it binds with TNF-α bound to precoated antibody. Wash unbound components and add HRP-Streptavidin Conjugate (SABC). Wash unbound components again and add TMB substrate solution. Then, TMB was catalyzed by HRP to produce a blue color product that turned yellow after adding a stop solution. Read the O.D. absorbance at 450nm in a microplate reader. Calculate the concentration of TNF-α in the sample by plotting standard curve. The concentration of the target substance is proportional to the OD450 value.

Catalogue No.: 
ER1393
Alias: 
Tumor necrosis factor ELISA Kit, Cachectin ELISA Kit, TNF-alpha ELISA Kit, Tumor necrosis factor ligand superfamily member 2 ELISA Kit, TNF-a ELISA Kit, Tumor necrosis factor, membrane form ELISA Kit, N-terminal fragment ELISA Kit, NTF ELISA Kit, Intracellular domain 1 ELISA Kit, ICD1 ELISA Kit, Intracellular domain 2 ELISA Kit, ICD2 ELISA Kit, C-domain 1 ELISA Kit, C-domain 2 ELISA Kit, Tumor necrosis factor, soluble form ELISA Kit, TNF ELISA Kit, TNFA ELISA Kit, TNFSF2 ELISA Kit
Species: 
Rat
Range: 
3.906-250pg/ml
Sensitivity: 
2.344pg/ml
Size Price
96T Inquiry
48T Inquiry
Dispatch Time: About 3 working days
  • SPECIFICATIONS
  • CITATIONS
  • FIGURES
  • CONDITIONS
  • FAQS
Product Name
Rat TNF-α(Tumor Necrosis Factor Alpha) ELISA Kit
Alias
Tumor necrosis factor ELISA Kit, Cachectin ELISA Kit, TNF-alpha ELISA Kit, Tumor necrosis factor ligand superfamily member 2 ELISA Kit, TNF-a ELISA Kit, Tumor necrosis factor, membrane form ELISA Kit, N-terminal fragment ELISA Kit, NTF ELISA Kit, Intracellular domain 1 ELISA Kit, ICD1 ELISA Kit, Intracellular domain 2 ELISA Kit, ICD2 ELISA Kit, C-domain 1 ELISA Kit, C-domain 2 ELISA Kit, Tumor necrosis factor, soluble form ELISA Kit, TNF ELISA Kit, TNFA ELISA Kit, TNFSF2 ELISA Kit
Catalogue No.
ER1393
Size
48T/96T
Species
Rat
UniProt ID
P16599
Sample Type
Serum, Plasma, Cell Culture Supernatant, cell or tissue lysate, Other liquid samples
Detection Method
Sandwich ELISA, Double Antibody
Detection Wavelength
OD450
Reaction Duration
4 hours
Range
3.906-250pg/ml
Sensitivity
2.344pg/ml
Storage
2-8°C(Sealed), Don't cryopreserve.
Specificity
Specifically binds with TNF-α , no obvious cross reaction with other analogues.
ELISA Kit Components
Kit Components Item Size(48T) Size(96T) Storage Condition for Opened Kit
E001 ELISA Microplate(Dismountable) 8×6 8×12 Put the rest strips into a sealed foil bag with the desiccant. Stored for 1 month at 2-8°C; Stored for 6 month at -20°C
E002 Lyophilized Standard 1vial 2vial Put the rest standards into a desiccant bag. Stored for 1 month at 2-8°C; Stored for 6 month at -20°C
E003 Biotin-labeled Antibody(Concentrated, 100X) 60ul 120ul 2-8°C (Avoid Direct Light)
E034 HRP-Streptavidin Conjugate(SABC, 100X) 60ul 120ul
E024 TMB Substrate 5ml 10ml
E039 Sample Dilution Buffer 10ml 20ml 2-8°C
E040 Antibody Dilution Buffer 5ml 10ml
E049 SABC Dilution Buffer 5ml 10ml
E026 Stop Solution 5ml 10ml
E038 Wash Buffer(Concentrated, 25X) 15ml 30ml
E006 Plate Sealer 3 pieces 5 pieces  
E007 Product Description 1 copy 1 copy
Required Instruments and Reagents
  1. Microplate reader (wavelength: 450nm)
  2. 37°C incubator (CO2 incubator for cell culture is not recommenced.)
  3. Automated plate washer or multi-channel pipette/5ml pipettor (for manual washing purpose)
  4. Precision single (0.5-10μL, 5-50μL, 20-200μL, 200-1000μL) and multi-channel pipette with disposable tips(Calibration is required before use.)
  5. Sterile tubes and Eppendorf tubes with disposable tips
  6. Absorbent paper and loading slot
  7. Deionized or distilled water
Assay Procedure Summary
Elisa实验原理图
  • Step 1: Add 100ul standard or sample into each well, seal the plate and statically incubate for 90 minutes at 37°C.
  • Washing: Wash the plate twice without immersing.
  • Step 2: Add 100ul biotin-antibody working solution, seal the plate and statically incubate for 60 minutes at 37°C.
  • Washing: Wash the plate three times and immerse for 1min each time.
  • Step 3: Add 100ul HRP-Streptavidin Conjugate (SABC) working solution, seal the plate and statically incubate for 30 minutes at 37°C.
  • Washing: Wash the plate five times and immerse for 1min each time.
  • Step 4: Add 90ul TMB substrate solution, seal the plate and statically incubate for 10-20 minutes at 37°C. (Accurate TMB visualization control is required.)
  • Step 5: Add 50ul stop solution. Read at 450nm immediately and calculate.
Standard Curve

This product is detected by QC department and meets performance required in the manual. (Laboratory Humidity: 20%-60%; Temperature: 18°C -25°C; Equilibrate TMB substrate to 37°C before staining. After adding into the ELISA wells, incubate for 15min at 37°C in dark.)

Due to different assay environments and operations, assay data below and standard curve are provided for reference. Experimenters should establish standard curve according to their own assay.

STD.(pg/ml) OD-1 OD-2 Average
0 0.088 0.092 0.09
3.906 0.111 0.116 0.113
7.813 0.134 0.14 0.137
15.625 0.264 0.274 0.269
31.25 0.433 0.45 0.442
62.5 0.742 0.772 0.757
125 1.242 1.292 1.267
250 2.005 2.087 2.046
ER1393 Standard Curve Image
Recovery

Add a certain amount of TNF-α into the sample. Calculate the recovery by comparing the measured value with the expected amount of TNF-α in the sample.

Sample Type Recovery Range(%) Average(%)
serum(n=10) 88-96 93
EDTA plasma(n=10) 90-97 94
Heparin plasma(n=10) 86-104 96
Linearity

Dilute the sample with a certain amount of TNF-α at 1:2, 1:4 and 1:8 to get the recovery range.

Sample Type 1:2 1:4 1:8
serum(n=10) 89-93% 86-105% 87-100%
EDTA plasma(n=10) 85-98% 82-96% 83-101%
Heparin plasma(n=10) 81-100% 81-99% 84-100%
Precision(%)

Intra-assay Precision: samples with low, medium and high concentration are tested 20 times on the same plate.

Inter-assay Precision: samples with low, medium and high concentration are tested 20 times on three different plates.

Item Intra-assay Precision Inter-assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 20 20 20
Mean (pg/ml) 7.78 30.39 124.29 8.11 30.97 125.2
Standard deviation 0.48 1.34 5.56 0.36 1.46 6
CV(%) 6.2 4.42 4.47 4.5 4.72 4.79
Stability

Perform the stability test for the sealed kit at 37°C and 2-8°C and get relevant data.

ELISA kit(n=5) 37°C for 1 month 2-8°C for 6 months
Average(%) 80 95-100
IF: 9.5
Journal:
ACS Applied Materials & Interfaces
Author:
Department of Burn, Wound Repair & Reconstruction, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510080, China
Cited Date:
2023-08-11
Product:
IF: 7.7
Journal:
International Journal of Biological Macromolecules
Author:
South China Research Center for Acupuncture and Moxibustion, Guangzhou University of Chinese Medicine, Guangzhou 510006, Guangdong, PR China.
Sample:
supernatant
Cited Date:
2024-10-08
Product:
IF: 6.7
Journal:
Phytomedicine
Author:
Southern Medical University Hospital of Integrated Traditional Chinese and Western Medicine, Peng Kang National Famous Traditional Chinese Medicine Expert Inheritance Studio, Southern Medicine University, Guangzhou 510315, China; Key Laboratory of Drug Me
Cited Date:
2024-07-05
Product:
IF: 6.2
Journal:
Ecotoxicology and Environmental Safety
Author:
The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, School of Public Health, Department of Toxicology, Guizhou Medical University,?Guian New Area, Guizhou 561113,?China.
Sample:
serum
Cited Date:
2024-08-02
Product:
IF: 5.6
Journal:
International Immunopharmacology
Author:
Department of Intensive Care Unit, Baoding First Central Hospital, Baoding, China
Cited Date:
2024-01-12
Product:
IF: 5.6
Journal:
Journal of Functional Foods
Author:
Department of Pharmacognosy and Medicinal Plants, Faculty of Pharmacy, Future University in Egypt, 11835 Cairo, Egypt
Cited Date:
2023-11-24
Product:
IF: 5.6
Journal:
Industrial Crops and Products
Author:
Regional Plant Resource Centre, Medicinal & Aromatic Plant Division, Forest, Environment & Climate Change Department, Govt. of Odisha, Nayapalli, Bhubaneswar 751015, India
Cited Date:
2024-08-23
Product:
IF: 5.2
Journal:
Life Sciences
Author:
Department of Pharmacology and Biochemistry, Faculty of Pharmacy, Delta University for Science and Technology, International Coastal Road, Gamasa, Dakahliya, Egypt.
Cited Date:
2024-10-18
Product:
IF: 4.6
Journal:
Scientific Reports
Author:
Department of Animal Physiology and Ethology, Faculty of Natural Sciences, Comenius University, Ilkovicova 6, 842 15, Bratislava, Slovakia
Cited Date:
2023-09-08
Product:
IF: 4.6
Journal:
Toxics
Author:
Guangdong Provincial Key Laboratory of Utilization and Conservation of Food and Medicinal Resources in Northern Region, College of Biology and Agriculture, Shaoguan University, Shaoguan 512005, China.
Species:
testicular and epididymal tissue samples
Cited Date:
2024-06-14
Product:
IF: 4.4
Journal:
Neurochemical Research
Author:
Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, China.
Sample:
serum and hippocampus
Cited Date:
2024-03-22
Product:
IF: 3.9
Journal:
Biological Trace Element Research
Author:
The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Department of Toxicology, School of Public Health, Guizhou Medical University, Guiyang, 550025, China
Cited Date:
2023-12-22
Product:
IF: 3.8
Journal:
Scientific Reports
Author:
Department of Neurosurgery, Neuromedicine Center, Beijing Shijitan Hospital, Capital Medical University, No. 10, Tieyi Road, Yangfangdian, Haidian District, Beijing, 100038, China.
Sample:
serum
Cited Date:
2024-12-13
Product:
IF: 3.568
Journal:
Journal of Biochemical and Molecular Toxicology
Author:
Department of Chemistry and Chemical Processing Technologies, Macka Vocational School Karadeniz Technical University Trabzon Turkiye
Cited Date:
2023-06-30
Product:
IF: 3.5
Journal:
Psychopharmacology
Author:
Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt.
Sample:
brain homogenates
Cited Date:
2025-01-24
Product:
IF: 3.4
Journal:
AAPS PharmSciTech
Author:
Department of Pharmaceutics, Faculty of Pharmacy, Mansoura University, Mansoura, 35516, Dakahlia, Egypt.
Sample:
lung homogenate
Cited Date:
2025-01-24
Product:
IF: 3.1
Journal:
Naunyn-Schmiedeberg's Archives of Pharmacology
Author:
Faculty of Veterinary Medicine, Department of Physiology, Hatay Mustafa Kemal University, Hatay, Turkey.
Cited Date:
2024-11-15
Product:
IF: 3
Journal:
Applied Biochemistry and Biotechnology
Author:
Zhucheng Maternal and Child Health Center, No. 343 Dongguan Street, Zhucheng, Weifang, Shandong, 262200, People’s Republic of China
Cited Date:
2023-07-21
Product:
IF: 2.9
Journal:
Immunological Investigations
Author:
Obstetrics Department, Zibo Central Hospital, Zibo, Shandong, China.
Cited Date:
2024-11-15
Product:
IF: 2.9
Journal:
Obesity Surgery
Author:
Department of Gastroenterology, Affiliated Hospital of North Sichuan Medical College, South Maoyuan Road, Shunqing District, Nanchong City, 637000, Sichuan Province, China
Cited Date:
2024-03-01
Product:
IF: 2.9
Journal:
Brain Research
Author:
Obstetrics Department, Maternal and Child Health Hospital of Hubei Province, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430070, P.R. China
Cited Date:
2023-09-01
Product:
IF: 2.8
Journal:
Journal of Pharmacy and Pharmacology
Author:
Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, Hamdard, New Delhi 110062, India.
Cited Date:
2024-09-13
Product:
IF: 2.6
Journal:
Pharmaceutical Development and Technology
Author:
Department of Pharmacology and Toxicology, Faculty of Pharmacy, Zagazig University, Zagazig, 44519, Egypt.
Cited Date:
2024-09-27
Product:
IF: 2.5
Journal:
Journal of Pain Research
Author:
Institute of Basic Medicine and Forensic Medicine, North Sichuan Medical College, Nanchong, Sichuan, People’s Republic of China
Sample:
supernatants
Cited Date:
2024-07-26
Product:
IF: 2.4
Journal:
Medicina
Author:
Department of Physiology, Faculty of Medicine, Kutahya Health Sciences University, Kutahya 43020, Turkey
Sample:
supernatants
Cited Date:
2025-03-14
Product:
IF: 2.3
Journal:
Respiratory Physiology & Neurobiology
Author:
Biomedical Centre Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Mala hora 4C, 036 01 Martin, Slovakia
Cited Date:
2023-08-18
Product:
IF: 1.9
Journal:
Alternative Therapies in Health and Medicine
Author:
School of Public Health, Xi’an Jiaotong University, Xi’an Shaanxi, China.
Sample:
blood samples
Cited Date:
2024-08-02
Product:
IF: 1.6
Journal:
Cellular and Molecular Biology
Author:
Department of Traumatic Surgery& Emergency Surgery, The 1st Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang,325000, China
Cited Date:
2023-10-13
Product:
IF: 0.944
Journal:
Indian Journal of Experimental Biology
Author:
C U Shah College of Pharmacy, S.N.D.T. Women’s University, Juhu Campus, Juhu Rd, Santacruz (W), Mumbai - 400 049, Maharashtra, India
Cited Date:
2023-06-09
Product:
IF: 0.9
Journal:
The Eurasian Journal of Medicine
Author:
Department of Pharmaceutical Technology and Management, Azerbaijan Medical University Faculty of Pharmacy Baku, Azerbaijan
Sample:
supernatant
Cited Date:
2024-11-01
Product:
Journal:
HAYATI Journal of Biosciences
Author:
Benemerita Universidad Autonoma de Puebla, 3972, Centro de Agroecología, Instituto de Ciencias, Puebla, Puebla, Mexico.
Sample:
supernatant
Cited Date:
2025-02-14
Product:
Journal:
Novosti Khirurgii
Author:
Department of Surgery and Transplantation, Belarusian State Medical University, Minsk, Dzerzhinsky Ave. 83, 220116, Republic of Belarus
Cited Date:
2023-10-08
Product:
Journal:
Environmental Analysis Health and Toxicology
Author:
Department of Human Anatomy, Kaduna State University, State, Nigeria
Cited Date:
2024-01-19
Product:
Journal:
Indonesian Journal of Nutrition and Food
Author:
Department of Nutrition Sciences, Faculty of Medicine, Diponegoro University, Semarang 50275, Indonesia
Sample:
serum
Cited Date:
2025-02-28
Product:
Journal:
International Journal of Multidisciplinary Research and Analysis
Author:
Faculty of Medicine, Universitas Islam Sultan Agung, Jl Kaligawe KM 4 Semarang 50012
Cited Date:
2024-05-06
Product:
Journal:
Frontiers in Health Informatics
Author:
Department of Physiology, Pharmacology and Biochemistry, College of Veterinary Medicine, University of Basrah, Iraq
Sample:
serum
Cited Date:
2024-09-27
Product:
Journal:
SSRN
Author:
School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi 330006, P.R. China
Sample:
SCG and neuron culture medium
Cited Date:
2024-07-26
Product:
Journal:
FUDMA Journal of Sciences
Author:
Department of Human Physiology, Faculty of Basic Medical Science, Ahmadu Bello University, Zaria, Nigeria.
Sample:
serum
Cited Date:
2024-08-02
Product:
Journal:
SSRN
Author:
Biotechnology Program, Basic and Applied Sciences Institute, Egypt-Japan University of Science and Technology (E-JUST), 21934, New Borg El-Arab City, Alexandria, Egypt
Cited Date:
2024-03-01
Product:
Journal:
Bilecik Seyh Edebali University Journal of Science
Author:
Department of Chemistry and Chemical Processing Technologies, Macka Vocational School, Karadeniz Technical University, 61750 Trabzon, Türkiye
Sample:
supernatants
Cited Date:
2024-06-07
Product:
Journal:
Sahel Journal of Life Sciences FUDMA
Author:
Department of Biochemistry and Molecular Biology, Federal University Dutsin-Ma, P.M.B 5001, Katsina State, Nigeria
Sample:
serum
Cited Date:
2024-03-08
Product:
Journal:
Journal of Advanced Veterinary Research
Author:
Department of Animal Product Technology, Faculty of Animal Science, Universitas Gadjah Mada, Jl. Fauna 3, Bulaksumur, Yogyakarta 55281, Indonesia.
Sample:
culture supernatants
Cited Date:
2025-01-10
Product:
Journal:
F?rat University Medical Journal of Health Sciences
Author:
Gaziantep University, Faculty of Medicine, Department of Physiology, Gaziantep, T?RK?YE
Cited Date:
2023-07-07
Product:
Journal:
Phytomedicine Plus
Author:
Dairy Department, Food Industries and Nutrition Research Institute, National Research Centre, Cairo 12622, Egypt
Species:
blood samples
Cited Date:
2024-06-14
Product:
Journal:
Egyptian Pharmaceutical Journal
Author:
Drug Radiation Research Department, National Centre for Radiation Research and Technology, Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt.
Sample:
heart homogenate
Cited Date:
2025-04-18
Product:
About FineTest® ELISA Kits
What’s the plate size in FineTest® ELISA Kits?

The ELISA plate follows the standard size of microplate: 127.64 mm x 85.60 mm x 14.22 mm(L x W x H).

How about the shelf life and stability of FineTest® ELISA Kits?

Valid for 12 months since the production date. For the shelf life of specific batch number, please check the label printed on the kit. Before delivery, all FineTest® ELISA Kits have been subject to strict quality test.

Which cloned antibodies for FineTest® ELISA Kits are used?

These information is proprietary. Please contact us to learn more about clonality (polyclonality or monoclonality) and host species.

Can I mix reagents from different batches of FineTest® ELISA Kits?

Not suggested. ELISA reagents are optimized for specific batch.

Can FineTest® ELISA Kits be used partially?

Yes. The ELISA plate is dismounted. Enough component volumes are offered by 96T ELISA kit, supporting two groups of standard curve.

How long can the diluted lyophilized standard be stored for continual use?

Used up within 12h.

Can standard curve be extended to any direction?

FineTest® can't support validation of standard concentration outside of standard curve. Ranges of standard curve have been validated among many batches and experimenters, showing stable and accurate performance. The lowest standard concentration is the minimized range for reliable detection results. Adding higher or lower concentration of standard may cause inconsistent signal or false positive.

Sample Issues
Why does detection for serum/plasma sample by FineTest® ELISA Kits require for 1/2 dilution?

Matrix components in serum/plasma can affect detection results. Blocking components in sample dilution buffer can decrease or remove the interference. The dilution can reduce the matrix difference between sample and standard to get better accuracy.

What’s the half-life of protein in serum/plasma/cell culture supernatant?

FineTest® can't determine the half-life of protein in the sample(e.g. serum, plasma or cell culture supernatant). Usually, it's suggested to detect prepared sample immediately or aliquot sample to refrigerate in a disposable container. Avoid freeze-thaw cycle to prevent protein degradation.

What's the expected concentration for particularly analyzing my sample?

Due to the specificity of each sample, it's hard to forecast and depend on sample preparation as well as analytical characteristics. Please contact us to get detection data for reference.

How many samples can FineTest® ELISA Kits detect?

It depends on whether duplicate assay for your sample is required. Such as, you can detect 80 samples without duplication or 40 samples.

Operational Issues
Why is sample loading conducted after equilibrating all kits’ components and samples to room temperature?

Temperature is the important factor for ELISA binding reaction. The reaction of samples at a consistent temperature requires for equilibrating all reagents to room temperature before the assay, including tested samples. Avoid the inaccurate ELISA assay results caused by temperature differences.

Why is duplicate assay suggested for ELISA assay?

To get more accurate assay results, it's strongly suggested to conduct duplicate assay for the standard and sample. Duplicate assay can calculate average value to ensure more accurate assay results and solve drift caused by misoperation during the assay. Calculation of CV evaluates experimental operation and precision of the ELISA kit.

How to get the standard curve with excellent linearity?

Follow the suggested method in the manual to store the standard. Before dissolving the standard, transient centrifugation is required to completely collect the powder. Confirm the fully dissolution and mixing of the standard(about 10min). Then, conduct steps of series dilution. Ensure the fully mixing and accurate pipetting in each step. Properly stop the staining. Choose suitable fitting equation to plot the standard curve.

Can ELISA plates be stacked together for incubation?

To keep the consistent environmental condition of all plates, stacking is not suggested during incubation.

Why is polypropylene tube used for standard dilution in some analyses?

Some proteins or analytes can bind with glass or polystyrene. However, they are not easy to bind with polypropylene tube.

When to stop ELISA reaction?

ELISA assay finally requires for enzyme-catalyzed substrate to complete the staining reaction. Stopping the reaction at the best time is the important factor for successful ELISA assay. When the blue complex appears after adding TMB substrate for 12min, read the O.D. absorbance at 620nm. The staining can be stopped, when the OD value of the darkest color at 620nm is between 0.8 - 0.9. The relevant OD value at 450nm for stopping the staining is between 2.0 - 2.5. If the OD value at 620nm is lower than 0.8, the staining duration can be properly extended.

Why is dual wavelength selected for reading in a microplate reader? What's the purpose of wavelength correction?

Dual wavelength for reading in ELISA assay mainly aims to remove non-specific background interference, and improve accuracy and reliability of the detection. FineTest® usually suggests to set the corrected wavelength as 570nm or 630nm in a microplate reader. The OD value may be higher when directly reading at 450nm. However, the accuracy is lower.

Why is 4 - pl curve fitting is required for generating standard curve?

FineTest® recommends to use ELISA curve fitting software and validate ELISA kit with 4 - pl curve fitting. 4 - pl curve fitting mainly aims to accurately describe the nonlinear dynamic characteristics of antigen - antibody binding. Thus, the quantitative accuracy of low or high concentration of sample is improved. Experimental errors are decreased. The reliability and reproducibility of assay results are ensured.

If sample OD value is higher than OD value of the highest point on the standard curve, what's the suggested solution?

Dilute the sample with dilution buffer and conduct the detection again. Ensure the detected value of the sample falls in the range of standard curve.

Publication Rewards
Are there any rewards to publish papers using FineTest® ELISA Kits?

If you published paper using FineTest® ELISA Kits, you will obtain US$150-US$550 coupon, please contact us for more details.

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