3M Duct Tape 3939 Silver, 48 mm by 54.8 m [PRICE is per ROLL] Heavy-duty silver duct tape with high tack and easy tear Ideal for bundling, sealing and holding applications Rubber adhesive grips on contact; waterproof backing resists wear Meets UL723, HUD, BOCA codes Measures 72-millimeters-by-52-meters (WxL); weighs 1.8 pounds