3M Regalite Floor Surfacing Belts, 40Y Grit, 9-7/8 in x 29-1/2 inTough, aggressive belt. Best productivity and value on bare wood or nongummy finishes. Cuts faster, runs cooler. Features 3M Cubitron ceramic aluminum oxide mineral blend, 761D. Durable Ywt cloth backing. Non-directional splice.