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.