... Rolls, Resin Over Resin, Electro-coated, Made of Aluminum Oxide and Silicone Carbide Backing: paper rolls Detailed Product DescriptionAbrasive ... Electro-coated, Made of Aluminum Oxide and Silicone CarbideSpecifications/Special Features:Materials:brown aluminum oxide, white aluminum oxide and silicone carbideBacking ... Rolls, Resin Over Resin, Electro-coated, Made of Aluminum Oxide and Silicone Carbide