... bulk density silicon carbide abrasive grain. Description:GC-GPA is a green, friable, medium bulk density silicon carbide abrasive grain ... magnetic material, and sieve the grains carefully to get a complete range of grit sizes.Applications:GC-GPA can ... Sizes Available (F or JIS):12, 14, 16, 20, 22, 24, 30, 36, 40, 46, 54, 60, 70, 80, 90 ... . Green Silicon Carbide / GC-GPA for vitrified bonded grinding wheel