Scotch® Super 33+ Electrical Tape a black, 7 mil tape, on a 1.5 inch core, combines the flexibility of a PVC backing with excellent electrical insulating properties to provide primary electrical insulation for splices up to 600V. Abrasion-, corrosion-, and UV-resistant, it makes an excellent protective jacketing for high-voltage cables and wire harnessing. UL Listed and CSA Certified, it resists alkalis and acids, and is flame-retardant. Excellent all-weather performance in cold to 0°F (-18°C) or hot to 220°F (105°C).