... GS, FFU, CCC, ROHS, PAHS, ISO9001 This kind diamond cup grinding wheel are made 6 shapes, every shape including 7 sizes.And ... every size is parted 3 grades: A grade ,B grade, C grade.Details: ... Dia IdSize 100 20/22.23 5×7.5115 20/22.23 5×7.5125 20/22.235×7. ... 7.518020/22.235×7.520020/22.23 5×7.523020/22.23 5×7.5 Others shape diamond cup wheel : Diamond Cup Grinding Wheel