This Heat Shrink Kit is very suitable for any project workshop, fixing the broken wires, electrical insulation, mechanical protection, wire bandwidth, wire connection, wire ends process, wire / cable junctions, daily repairs, color coding etc.Retraction Ratio for these heat shrink tube is 2: 1 or more, made of polyolefin, good electrical isolation or insulation of the open wires or the connected one.Assorted Heat Shrink Sleeving with Different Colors: 5 colors (yellow, blue, black, green, red) in a 12 compartments organizer, satisfied for geeneral DIY home and auto electrics. Heat Shrink Tube Length: 45mm, Inner Diameter: 1mm / 1.5mm / 2mm / 2.5mm / 3mm / 3.5mm / 4mm / 5mm / 6mm / 7mm / 10mm / 13mm.Extremely useful range of heat shrink tubing, you will find this absolutely efficacious when you need to fix or repair a broken wire, because you need to have a good electrical isolation or insulation of the open wires or the connected one, so that they won't touch other bare wires and causing short-circuit which may lead to safety issues.Easy to use, cover the bare wire part with these tubes, heat it with soldering iron, heat gun or even hair dryer (hot enough), the tube will shrink protect the wires and give you a professional look of the repair jobHeat Shrink Tubing Set can perfectly protect wires, USB cables, metal rods and insulation of resistance and capacitance.Their precut lengths are Perfect for quick electronic project building and are much neater than wrapping insulation tape over wire joints It can take the place of electrical adhesive tape & sealers, keep the lasting protection.Material: PPNOTE:Minimum Shrinkage Temp: +70 Celsius Full Shrinkage Temp: +110 Celsius maximum Operating Temperature: -55 Celsius to + 125 Celsius Tensile strength:10.4Mpa Dielectric strength: 15 kV / mm Flammability: Flame Retardant Supplied format (round or flat ): Product is supplied flat Cuttingmethod: Scissors or sharp knifePackage Contents:90 x 1.0mm Black Heat Shrink Tubing70 x 1.5mm Red Heat Shrink Tubing80 x 2.0mm Yellow Heat Shrink Tubing70 x 2.5mm Green Heat Shrink Tubing50 x 3.0mm Black Heat Shrink Tubing45 x 3.5mm Blue Heat Shrink Tubing40 x 4.0mm Red Heat Shrink Tubing25 x 5.0mm Blue Heat Shrink Tubing20 x 6.0mm Blue Heat Shrink Tubing25 x 7.0mm Red Heat Shrink Tubing25 x 10.0mm Black Heat Shrink Tubing20 x 13.0mm Black Heat Shrink TubingOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.