... , 3.durable, 4.stronger flexibility than WA, 1.abrasive product cover various specifications of vitrified abrasives with the diameter ... ZrO increases.3. Only no harder than Boron carbide and Diamond, friable, its girt is sharp, and Thermal conductivity4 ... Wheel should be written according to the order, shape, size, abrasive material, grain, grade, , and speed SpeciesCode No.colorfeaturesselectionbrown ...