Features Made of polyethylene material, with good electrical insulation, corrosion resistance and high temperature resistance. Heat activated adhesive lining provides good impermeable sealing for salt water and other liquids. With heat shrink ratio of 2:1, and it will shrink to 1/2 of the original when heated with a small fire or a hair dryer. The kit contains 8 sizes of heat shrinkable tubes, which can be applied to different situations and have strong applicability. Suitable for electrical insulation, wire bundling, mechanical protection, cable joints and daily maintenance, etc. Specification: Item Type: Heat Shrink Tubing Kit Material: PE(polyethylene) Shrinkage Ratio: 2: 1 Specification Size: Approx. 2 x 30mm / 0.08 x 1.18in, 2.5 x 60mm / 0.1 x 2.36in, 3.5 x 60mm / 0.14 x 2.36in, 5 x 60mm / 0.2 x 2.36in, 6 x 60mm / 0.24 x 2.36in, 8 x 100mm / 0.3 x 3.9in, 10 x 100mm / 0.4 x 3.9in, 13 x 100mm / 0.5 x 3.9in Uses: Suitable for electrical insulation, wire bundling, mechanical protection, cable joints and daily maintenance, etc. Package List: 51 x Heat Shrinkable Tube 2 x 30mm 40 x Heat Shrinkable Tube 2.5 x 60mm 25 x Heat Shrinkable Tube 3.5 x 60mm 16 x Heat Shrinkable Tube 5 x 60mm 10 x Heat Shrinkable Tube 6 x 60mm 10 x Heat Shrinkable Tube 8 x 100mm 10 x Heat Shrinkable Tube 10 x 100mm 8 x Heat Shrinkable Tube 13 x 100mm Package List 51 x Heat Shrinkable Tube 2 x 30mm 40 x Heat Shrinkable Tube 2.5 x 60mm 25 x Heat Shrinkable Tube 3.5 x 60mm 16 x Heat Shrinkable Tube 5 x 60mm 10 x Heat Shrinkable Tube 6 x 60mm 10 x Heat Shrinkable Tube 8 x 100mm 10 x Heat Shrinkable Tube 10 x 100mm 8 x Heat Shrinkable Tube 13 x 100mm