Dear Sir please let me know if i can help to find the following product to buy in high quantity Here is the original product details but the copy of this brand is with cheaper price is ok The products name is Beta Star test kit to find out about the Antibiotic and Tetracycline in cow milk which is coming in 2 version and mad in U.S.A 1:The old one( only for antibiotics ) 2:The new one(antibiotics+tetracycline)which is called combo PLEASE NOTE:The main company(Inventor) which is in U.S.A is Neogen corporation but the global distributor is Chr-hansen in Denmark which has representative all around the world please see the lin for your reference:http://www.neogen.com/foodsafety/BS_Index.asp Regards Sarajam group Trading dept Reza