... , medium bulk density silicon carbide abrasive grain. Description:GC-GPA is a green, friable, medium bulk density ... get a complete range of grit sizes.Applications:GC-GPA can be used in refractory, ceramic and ... speed steel. As loose grains, it is widely used for polishing none-metal material like ceramic, glass, stone, ... or ISO 8486-1. Green Silicon Carbide / GC-GPA for vitrified bonded grinding wheel