... Oxide is fused in an electrical arc furnace at high temperature (approximately 2000 degrees Celsius) from a mixture of bauxite ,coal ... precision casting3 Grit Size Available (F series for bonded abrasive and sandblasting, P series for coated abrasive)F series: F4, F8, F10, F12, F14 ... , F320, F360, F400, F500, F600, F800, F1000, F1200,F1500,F2000P series: P8, P10, P12, P16, P24, P30, P36, P40, P50, P60 ...