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 supply to all customers and market with very regularly. If you have any interest about our productï¼?please don't hesitate to contact me.