Dear Sir/Madam: I am very glad to introduce our company for you,Hunan Jingshi Group Co.,Ltd is the biggest manufacturer of Zinc Sulphate Monohydrate in China,also is the first one manufacturer which got the European FAMI-QS certificate in 2007 for Zinc Sulphate Monohydrate industry with 60000mt production line. So under the ISO 14001 2004 and HACCP quality management, we assure our products safety and the quality to our customers and the final users. Commodity: Jingshi Zinc Sulphate Monohydrate Specification: Powder :Zn:35% min As:5ppm max Cd:10ppm max Pb:10ppm max Granular:Zn:33% min As:5ppm max Cd:10ppm max Pb:10ppm max Size:1-2mm or 2-4mm If you want to get more details,you can directly contact with me .We sincerely hope to get your interest and comment for this. Best Regards! Aaron Deng Hunan Jingshi Group Co,. Ltd Address:XiangtianWesternRoad321,ShifengDistrict ,Zhuzou ,China. TEL:86-731-28330757 FAX:86-731-283336