Bore Polisher, Abrasive Type Coated, Grit 120, Abrasive Material Aluminum Oxide, Series R369, Backing Material Cotton/Polyester, Backing Weight Y, Compatible Bore Inner Diameter (Maximum) 1 in, Compatible Bore Inner Diameter (Minimum) 5/8 in, Maximum Operating Speed 25, 000 RPM, Compatible Mandrel Grainger Part Number 3RB56, Compatible Mandrel Manufacturer Model Number 08834154182, 08834154460. This item has been restricted from sale in the following state (s): []