Standard Pack = 1 piece(s). Type = Felt Polishing Flap Roll ; Size = 4 x 4 x 3/4 Inch Quad Keyway ; Flap Thickness = D5 ; Felt Density = H25 ; Density = Soft Flexible ; Maximum RPM = 1900 - 3700 ; Feature = Use In Combination With A Buffing Or Polishing Compound To Produce Up To A Mirror Finish, Made From 70% Wool Felt ;