We Promising Chemicals Company as one leading legal manufacturer and exporter in China who specialized in producing Zinc, Ferrous, Copper, Manganese Sulphate use as feed and fertilizer trace minerals for more than 15 years, having regular qualified production, most competitive pricing, special requirements and best service. As the first one which certificated by EU FAMI-QS quality control system for feed and pre-mixture used as trace element additive in all Chinese manufacturers, our production capacity for each products with more than 2500mt every month which make our al Ferrous Sulphate Heptahydrate Powder & Granular Ferrous Sulphate Monohydrate Powder & Granular 2. Copper Copper Sulphate Pentahydrate 3. Manganese Manganese Sulphate Monohydrate Powder & Granular 4. Zinc Zinc Sulphate Monohydrate Powder & Granular Zinc Sulphate Heptahydrate Crystal If you have any inquiry, Please get me back. (Sales2ATpromisingchemDOTcom)