The 3M 72-millimeter-by-52-meter silver duct tape is a heavy-duty duct tape with a special rubber adhesive that grips on contact. Its high-tack, strength and easy tear make it ideal for duct and moisture sealing, as well as holding, protecting, and bundling. The strong waterproof backing resists wear, abrasion, and weathering. It meets UL723, HUD, BOCA codes. This product measures 72-millimeters-by-52 meters (WxL) and weighs 1.8 pounds.