Description :100 Feet/30 Meter Black 1/2" / 12mm I.D Polyolefin 2 :1 Heat Shrink Tube TubingColor : Black Voltage : 600V @ 125 Degree Centigrade Size : 1/2" I.D / 12MM  (This Measurement it Taken When The Tubing is "Round" Not When "Flat")This listing is for a 100 ft spool of 1/2" 12mm 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 1/2" Polyolefin 2 :1 Heat Shrink TubingDetails pictures :