... as cutting and making jewelry, jade, agate. ♦ Grinding of gray cast iron, white cast iron, bronze, brass, ore, bone, glass, leather, rubber, plastic and ... 12#-90# 100#-180# 220# -240# w63 - w20# w14 - w598.5 98.0 97.0 96.0 93.00.20 0 ... .70P P12 - P100 P120 - P150 P180 - P220 P240# - 1200# 98.5 98.0 97.0 92.0 0.20 0.30 ...