... shape, size, abrasive material, grain, grade,and speed2.Suitable for the work pieces ... finish surfaces processing SpeciesCode No.colorfeaturesselectionbrown fused aluminaATanhigh rigidity, strong flexibility, low ... e.White aluminum oxideWAWhitelower rigidity weaker flexibility than A.Suitable for the ... silicon carbideCblackHarder than corundum, crisper, less flexibility.Suitable for process weak Tensile ...