4" granite marble 30 countertop bowl convex polish pad concrete stone buffer
Important remind: Velcro backers' s max velocity is 5000 RPM. (b) 8 Pieces of 4" Diamond Convex Polishing Pad for sink basin polishing. (c) 1 Piece of 4" Velcro backer and 1 Piece of 4" Rubber Convex Backer.