Mounted Flap Wheel, Abrasive Material Aluminum Oxide, Abrasive Type Coated, Backing Material Cotton, Backing Weight X, Grit 320, Series Not Applicable, Flap Width 5/8 in, Maximum Operating Speed 25,000 RPM, Shank Size 1/8 in, Overall Diameter 5/8 in, Shank Type Straight, Coating Coverage Closed, Resistance Properties Wear