Description : 100 Feet /30 Meter Black 1/4" / 6mm I.D Polyolefin 2 : 1 Heat Shrink Tube Tubing Color : Black Voltage : 600V @ 125 Degree Centigrade Size : 1/4" I.D / 6MM  (This Measurement it Taken When The Tubing is "Round" Not When "Flat") This listing is for a 100 ft spool of 1/4" 6mm ID Black solid color Polyolefin thin wall cross-linked Heat Shrink Tubing.  Has a 2 : 1 shrink ratio and is both UL & CSA certified at 600V @ 125 Degree Centigrade, RoHS compliant. Resistance to common fluids and solvents as well as high dielectric strength. It is suitable for a wide range of applications, including electrical insulation, strain relief, cable bonding, color-coding and identification. Package Included : 1 x 100 Feet Black 1/4" Polyolefin 2 : 1 Heat Shrink Tubing Details pictures :