Measure the diameter of wire/cable you want to wrap, make sure the diameter is equal to the size of heat shrink tube after shrinked, because the tube will shrink up to 1/2 of original diameter after heating.8 [Shrinkage ratio 2:1] The heat-shrinkable cable sleeve has excellent flame retardant and insulation properties. [Working temperature] - 55 to 125 ℃; Flammability: VW-1, flame retardant. It does not contain heavy metals and other environmental harmful substances, has no irritating smell, and is safe for human body. Cable Shrink Sleeving RS PRO Heat Shrink Tubing, Red 3mm Sleeve Dia. X 10m Length 3:1 Ratio | RS Electrical Insulation Sleeve Diameter (Before Shrinking): 8mm / 0.31 ; Length ( approx.): 30mm / 1.17 inch ; Shrink Ratio: 2:1. ★Operating Temperature: -55 to 125 Degree Celsius; Flammability [Wide use] Heat shrink sleevings are mainly used for electrical insulation, wire protection, cable connection, data cable decoration, color coding, wire marking, wire bundle, etc. [Material] The heat shrink tubing is made of environment-friendly materials and conforms to RoHS standards to ensure its safety and reliability. Black Heat Shrink Wrap Tube/Heat Shrinkable Tubing Easy to use, just wrap the target line and shrink it with a small hot-air blower, a small flame torch, a cigarette lighter, a hot-air gun or even a hair dryer or soldering iron
