Mercer Abrasives 530400-100 Platinum Stearated Discs, Pressure Sensitive Adhesive, 5-Inch x No Dust Holes Disc Rolls, 400C Grit, 100-Pack Silicon Carbide grain Platinum 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