Norton TufBak Durite Coated Sanding Sheet, Series: T461, 11 in Length, 9 in Width, 120 Grit, Medium Grade, Silicon Carbide Abrasive, Paper Backing, Closed Coat, Applicable Materials: 300 Series Stainless, Aluminum, Brass, Bronze, Fiberglass/Composites, Hard Carbon Steel, Hardwood, Soft Carbon Steel, Softwood, Super Alloys, Titanium and Glass, Charcoal, C-Weight Backing Weight, Waterproof: Yes