... 95.70% 2 grit size:F12-F220 3 for bonded abrasive and polishing 4 comply with FEPA ... wheel,etc..c Vitrified bonded grinding wheels and resin bonded grinding wheels.d Pressure blasting, ... F60, F70, F80, F90, F100, F120, F150, F180, F220, F230, F240, F280, F320, F360, F400, F500, F600 ... sharp shape, after good dust collecting, impurity and strongly magnetism material removing, carefully sieve classifying ...