●【Material】-Made of PE plastic, Shrinkage Ratio:2:1 (will shrink to 1/2 its supplied diameter) ●【Safe & ECO-Friendly】-Our heat shrink tubes are RoHS Compliant which ensures its safe and reliable. Does not contain heavy metal and other environmentally hazardous substances. Protect you and your family from toxins. ●【Fast & Easy Use】- Our heat shrink tubing has the advantages of good electrical insulation, corrosion resistance and high temperature resistance. Soft and flexible wire shrink wrap, low shrinkage temperature-minimum shrinkage temp: +248℉(+120°C), fast shrinkage, easy to use a heat gun. ●【Diameter(Before Shrinking)】-4mm/0.16" ;Length ( approx.):25mm/0.98" ; Shrink Ratio: 2:1. ●【Operating Temperature】- -55 to 125 Degree Celsius; Flame Retardant.