1、Application: Suitable for electrical insulation, wire bundling, color coding, mechanical protection, wires, cable joints and daily maintenance, etc. 2、Fast Melting: Heat shrinkable tubing and cables can quickly melting by heating, can fit your items more closely and avoid damage. The shrinkage ratio is 2: 1 3、Friction Resistance: The heat shrink tube set is friction and aging resistance, corrosion prevention, waterproof, environmental protection, insulation, and more closely surrounds the object 4、Basic Specifications: Equipped with 270 heat shrinkable tubes, 2 colours, 6 specifications, to meet your different needs 5、Easy to Store: The heat shrinkable tube set is suitable for wires and cables, all in the storage box, easy to store or carry 270 x Heat Shrinkable Tube1 x Storage Box Item Type: Insulation Heat Shrink TubeModel: 270 Pcs/SetsParameter Specification: Color Specification(Approx.) Length(Approx.) Quantity Red  Φ 1.6mm / 0.06in 45mm / 1.77in 35 Black Φ 1.6mm / 0.06in 45mm / 1.77in 35 Red  Φ 2.4mm / 0.09in 45mm / 1.77in 40 Black  Φ 2.4mm / 0.09in 45mm / 1.77in 40 Red  Φ 3.2mm / 0.12in 45mm / 1.77in 40 Black  Φ 3.2mm / 0.12in 45mm / 1.77in 40 Red  Φ 4.8mm / 0.19in 90mm / 3.54in 10 Black  Φ 4.8mm / 0.19in 90mm / 3.54in 10 Red  Φ 6.4mm / 0.25in 90mm / 3.54in 6 Black  Φ 6.4mm / 0.25in 90mm / 3.54in 6 Red  Φ 9.5mm / 0.37in 90mm / 3.54in 4 Black Φ 9.5mm / 0.37in 90mm / 3.54in 4