... of high alumina refractory.2 Applicationa. Bonded abrasive products. b coated abrasive products such as sand paper, sand cloth, ... , F320, F360, F400, F500, F600, F800, F1000, F1200,F1500,F2000P series: P8, P10, P12, P16, P24, P30, P36, P40, P50, ... grains of this products has very sharp shape, after good dust collecting, impurity and strongly magnetism material removing, carefully sieve classifying, ...