Mercer Abrasives 545320-100 Premium Gold Stearated Discs, Pressure Sensitive Adhesive, 5-Inch x No Dust Holes Disc Rolls, 320C Grit, 100-Pack Durable Aluminum Oxide grain Gold stearate Heavy C-weight paper Resin on resin bond For Porter-Cable #332, 7334, 7335; DeWalt # 420 and all 5-Inch Air D-A Machines