... :2008 certification. 2. More than 20 years Producing History. High Quality Brown Fused AluminaDetailed Product Description1. Description:♦ We specialized in manufacturing ... mold of precision casting3. Grit Size Available (P, F):P series: P8, P10, P12, P16, P24, P30, P36, P40, P50, ... P400, P500, P600, P800, P1000, P1200, P1500, P2000, P2500, P3000F series: F4, F8, F10, F12, F14, F16, F22, F24, F30, F36 ...