1、Wide Applications: Heat shrinkable tubing is often used for solder joint protection, wire group marking, resistance and capacitance protection, etc. 2、Simple Operation: The operation is simple, just connect the heat shrinkable tube to the wire and heat it, and it can still be bent at will after heat shrinking. 3、Polyolefin Material: Made of excellent polyolefin materials, which has good insulation and corrosion resistance, is safer to use. 4、Multiple Sizes and Colors: The kit contains heat shrink tubing of various sizes and colors, suitable for different maintenance needs. 5、With Storage Box: Includes a storage box with compartments for easy organization and storage of these heat shrinkable tubes, easy to use and replace. 80 x 1x38mm Black Tube80 x 1.5x38mm Yellow Tube50 x 2x38mm Blue Tube50 x 2x38mm Black Tube30 x 2.5x38mm Black Tube30 x 3x38mm Green Tube30 x 3x38mm Transparent Tube30 x 3.5x38mm Black Tube40 x 4x45mm Black Tube30 x 4x45mm Red Tube30 x 5x45mm Black Tube20 x 6x45mm Yellow Tube20 x 8x45mm Red Tube20 x 10x45mm Blue Tube20 x 10x45mm Black Tube20 x 10x45mm Transparent Tube Item Type: Heat Shrink Tubing KitMaterial: PolyolefinLength: Approx. 38mm / 1.5in, 45mm / 1.8inWorking Temperature: -55℃~+125℃Shrinkage Ratio: 2:1Uses: Suitable for electrical insulation, wire bundling, mechanical protection, cable joints and daily maintenance, etc.