Standard Pack = 1 piece(s). Arbor Hole = 3/16 IN ; Density = Hard ; Diameter = 1 IN ; Face Width = 1 IN ; Grit = Coarse ; Material = Aluminum Oxide ; Maximum RPM = 15,000 ; Size = 1 IN x 1 IN x 3/16 IN ; Type = Unified Non-Woven Wheel ;