... 3.stronger flexibility than WA,1.vitrified grinding wheel cover various specifications of vitrified abrasives with the ... , size, abrasive material, grain, grade, , and speedSpeciesCode No.colorfeaturesselectionbrown fused aluminaATanhigh rigidity, strong flexibility, low price, can ... work pieces made of materials Chilled steel, High-speed steel, High-carbon steel,Chromium corundumPAPink,rose-red ...