Please find quartz specification : Quartz Grit 0.1-0.3 mm Quartz Grit 0.3-0.7 mm Quartz Grit 0.6-1.2 mm Quartz powder- 38 micron (400 mesh) Quartz powder- 45 micron (325 mesh) Packing: in jumbo bags. 1.25 tons per bag/ 25 ton per container. Port: FOB Silica Content should be above 95% and 90% passing through the mesh and maximum 5% upper and lower size allowed Material should be free from impurities and moisture. Find attached few pictures of the premium grade and medium grade for your reference. Yearly requirement quart grit 8000 tons, powder: 4000 tons Thanks & best regards,