... ,china(mainland) type:abrasive flap disc brand name:KMJ usage:grinding ,polishing ,sanding KMJ-2711 diamond and CBN abrasive ... 15- 80mm, thicknss: 10-50mmSpecificationssuper hard diamond and cbn sanding products 1,for glass, stones,steel,etc 2,professional ... manufacturer 3,more economicThe superabrasive diamond and cbn sand paper products( abrasive belts, block, discs, pads, bands) ...