1,Sic 99%max 2,ISO9001 ♦ The black silicon carbide is of high hardness, ... brass, ore, bone, glass, leather, rubber, plastic and the thermal sensitive material.3. Partical size,Black silicon carbide F12 ... #-180# 220# -240# w63 - w20# w14 - w598.5 98.0 97.0 96.0 93.00.20 0 ... 0.30 0.40 0.400.60 0.80 1.20 1.50 1.70P P12 - P100 P120 - P150 P180 - P220 ... 98.5 98.0 97.0 92.0 0.20 0.30 0.30 2.5 0.60 0.80 1.20