Electrical Tape is a general purpose all-weather black PVC film electrical insulation tape with an aggressive rubber resin adhesive. It is a UL/CSA listed electrical tape on a 1 inch inner diameter small core. E-Tape-SC Electrical Tape is used for wire and cable insulation and bundling. Not flame retardant. NOTES: Sizes shipped will typically be the tape industry standard metric-cut sizes, i.e. 24mm for each 1 inch of nominal tape width ordered (rolls are approximately 5% narrower than the nominal size). This product’s actual size is 19mm wide.