1、ELECTRICAL INSULATION: Suitable for electrical insulation, wire bundling, color coding, mechanical protection, wire or cable joints and daily maintenance, etc. 2、QUICKLY MELTED BY HEATING: The heat shrinkable tube cable can be quickly melted by heating, so that can fit your items more closely and avoid damage 3、2:1 SHRINKAGE RATIO: The shrinkage ratio is 2:1, which surrounds the object more closely, very practical and useful 4、FRICTION PROOF: Casing shrink tube set has many good advantages, such as friction proof, aging proof, corrosion proof, waterproof, environmental protection, and insulation 5、WIDELY USED IN INSULATION PROTECTION: Widely used in insulation protection of wiring harness, solder joints, inductors, and rust proof 580 x Heat Shrink Tubing1 x Storage Box Item Type: Heat Shrink TubingModel: 580PcsProduct Parameter Specifications:  Model Colour Length(approx.) Quantity Dia 1.0mm Black 38mm / 1.5in 80 Dia 1.5mm Yellow 38mm / 1.5in 80 Dia 2.0mm Black 38mm / 1.5in 50 Dia 2.0mm Blue 38mm / 1.5in 50 Dia 2.5mm Black 38mm / 1.5in 30 Dia 3.0mm Green 38mm / 1.5in 30 Dia 3.0mm Transparent 38mm / 1.5in 30 Dia 3.5mm Black 38mm / 1.5in 30 Dia 4.0mm Black 45mm / 1.77in 40 Dia 4.0mm Red 45mm / 1.77in 30 Dia 5.0mm Black 45mm / 1.77in 30 Dia 6.0mm Yellow 45mm / 1.77in 20 Dia 10.0mm Transparent 45mm / 1.77in 20 Dia 10.0mm Black 45mm / 1.77in 20 Dia 10.0mm Blue 45mm / 1.77in 20 Dia 8.0mm Red 45mm / 1.77in 20