General Purpose Duct Tape. Heavy Duty. Imperial Tape W x L1-7/8 in x 60 yd ( 55Mx48mm ).Tape Thickness :13 mil. Tape Backing Material : Polyethylene Coated ClothTape . Adhesive Material : Rubber. Adhesion to Steel : 95 oz/in. Maximum Tape Performance Temperature : 200 DEG F. Minimum Tape Performance Temperature : 40 DEG F. Standards : UL 723