Cotton buffing wheel with 1/2 in (12.7 mm) arbor hole. Dimension of 6 in x 1/2 in x 55 ply. Spiral sewn stitches every 3/8 in (9.52 mm), face width of 1/2 in (12.7 mm). Maximum speed rating of 3600 rpm. For use on all 6 in (152.4 mm) buffing and grinding machines.