Canine Estrone Sulphate(E1S)ELISA Kit is designed and made by Cusabio for detectingEstrone Sulphate(E1S). For more product information, please check the following link: http://www.cusabio.com/product/ELISA_Kit/Canine_Estrone_Sulphate(E1S)ELISA_Kit-75671.html.