Polyolefin 2:1 Heat Shrink Tubing 1/16, 1/8, 3/16, 1/4, 3/8, 1/2 , 3/4, 1 Inch See images in photo gallery for detailed technical specifications Black color with no printing on tube Maximum voltage = 600 volts Temperature range: -55 Celsius to +125 Celsius Resistant to most solvents and fire resistant