cup grinding wheel diameter: 120-350mm silicon carbide and aluminum oxide ... and CuttingF36,F40,F46,F54Normal purpose semi-final finishingF60,F70,F80,F90,F100Normal purpose final finishingF120,F150,F180,F220,F230,F240,F280 ... Tread GrindingF500,F600,F800,F1000,F1200Mirror finish grinding, precision grinding. cup grinding wheels