High quality medium polyurethane foam for compounding/polishing cellulose and acrylics. Ideal for automotive and marine applications. Compatible with M14 x 2 male connection sander polishers and grinders. Max 4600rpm. High quality medium polyurethane foam for compounding/polishing cellulose and acrylics. Ideal for automotive and marine applications. Compatible with M14 x 2 male connection sander polishers and grinders. Max 4600rpm.