Scotch 80610833826 Super 33 Vinyl Electrical Tape Dispenser Pack D, 3/4 in x 66 ft (19 mm x 20,1 m) Scotch&#174 Super 33+&#8482 Electrical Tape a black, 7 mil tape, on a 1 inch core, combines the flexibility of a PVC backing with excellent electrical insulating properties to provide primary electrical insulation for splices up to 600V. Aggressive adhesive and elastic backing that enables it to easily conform to irregular surfaces for water-resistant electrical and mechanical protection