We produce and inspect our cargos according to International Satandard and customer's request. The Standard including DIN, ASTM, JIS, Fepa and ISO. We have our own technical people for quality control,taking samples in big percentage from the cargo by ourselves, sieving and analysis the size distribution and density; we use a public laboratory for testing the chemical content, and we rent a warehouse at Tianjin Port to store and packing material. The quality control is implemented in both at production and loading port, if any problem, it will be solved before shipping.