Features： 1、Used for Wire Maintenance: The heat shrinkable tube kit can be used for solder joint protection, wire group marking, resistance and capacitance protection, etc. 2、Safe Polyolefin Material: Made of durable polyolefin, with good electrical insulation, safe connection, and can ensure a heat shrinkage ratio of 2:1. 3、Good Performance: Has the functions of high temperature shrinkage, soft flame retardant, high strength, insulation and anticorrosion, and it can be bent at will after heat shrinking. 4、Multiple Size Options: The kit contains 8 sizes of heat shrinkable tubes, which can be applied to different situations and have strong applicability. 5、With Storage Box: Equipped with a storage box with compartments, convenient for sorting storage, and can be used and replaced at any time. Specification： Item Type: Heat Shrink Tubing Kit Material: Polyolefin Inner Diameter: Approx. 1.0mm / 0.04in 2.0mm / 0.08in 3.0mm / 0.12in 4.0mm / 0.16in 6.0mm / 0.24in 8.0mm / 0.31in 10.0mm / 0.39in 14.0mm / 0.55in Length: Approx. 40mm / 1.6in, 80mm / 3.1in Flammability: Flame retardant Working Temperature: -55℃~+125℃ Shrinkage Ratio: 2: 1 Uses: Suitable for electrical insulation, wire bundling, mechanical protection, cable joints and daily maintenance, etc. Package List： 60 x Tube(Yellow, Black, Red, Green) 1.0 x 40mm 30 x Tube(Yellow, Black, Red, Blue) 2.0 x 40mm 16 x Tube(Yellow, Black, Red, Green) 3.0 x 40mm 16 x Tube(Yellow, Black, Red,  Blue) 4.0 x 40mm 16 x Tube(Yellow, Black, Red, Green) 6.0 x 40mm 10 x Tube(Yellow, Black, Red,  Blue) 8.0 x 80mm 8 x Tube(Yellow, Black, Red, Green) 10.0 x 80mm 8 x Tube(Yellow, Black, Red,  Blue) 14.0 x 80mm