Durable standard abrasive of aluminium oxide. Available Sizes; 200mm & 250mm in Available Grit: 16, 24, 36, 40, 50, 60, 80, 100 & 120 Bona 8500 is a standard abrasive made of aluminium oxide, producing a very fine surface. It has a strong cotton backing for durability and stability. Compared to conventional aluminium oxide abrasives, Bona 8500 stands out as a highly durable and great value alternative. Key benefits: Very durable Open coat for cool sanding Great value Even sanding