SM Buffing and Compounding Pad. This pad is specially designed and manufactured for durability, performance and value. The construction of this pad includes select 100% twisted 4-ply wool yarn with a durable polymer backing to provide for quality compounding and buffing. Pads are washable for repeated use. Curved edge, 7 1/2 inches in diameter, 1 1/2 inch thick wool. 7/8 inch arbor hold, bolt on. You get one pad per bag. 57976