NST-20 4" x 20 yard 32 mil. 60 Grit silicon carbide. 3 Roll/Case"Sure-Step" non-skid safety tapes provide a high traction, anti-slip, waterproof surface to help prevent slips and falls. Aggressive acrylicadhesive bonds to a variety of materials and conforms to irregular surfaces. For use indoors & outdoors; on walkways, ramps, stairways;in machine shops & work areas, etc.; to comply with OSHA 1910.263 (3).White liner. 3" neutral core.