Yellow 3M Economy Vinyl Electrical Tape 1400C 3/4" x 60' x 7 mil 3M Tape 1400C is a 7 mil thick, colWHed, economy, electrical tape with a rubber adhesive. This low voltage, flame retaYEant tape is designed to provide electrical insulation fWH all wires and cables and is rated up to 600V. It continuously perfWHms in temperatures up to 176F (80C).