DIFFERENT SIZES AND COLORS --- Contains all the sizes you may need from professional repairs to DIY jobs at home, convenient when working with different sizes of wires. QUICK SHRINKAGE --- The shrinkage ratio is 2:1, the shrinkage temperature is 158F (70C) ~ 100C. At this temperature, the heat shrink tube will be evenly wrapped around the wire in 10 seconds. RELIABLE PERFORMANCE --- Cover the areas with heat shrink tube and shrink them with a heat gun to create tight seams with good insulation and flame retardant properties. PLASTIC BOX --- The heat shrink tubes are sorted in a clear plastic box with a compartment, with a color, size and location reference chart on the lid for better identification of the heat shrink tube size. WIDELY USED --- Can be used for electrical insulation, wire bundling, color coding, mechanical protection. Specification: Item Type: Heat Shrink Tubing Kit Material: PVC Shrinkage Rate: Shrinkage: 2:1 Parameter: Size (diameter x length) (approx.) Color Quantity (pcs) 1.0 x 45mm / 0.04 x 1.77in Black 90 1.5 x 45mm / 0.06 x 1.77in Red 70 2.0 x 45mm / 0.08 x 1.77in Yellow 80 2.5 x 45mm / 0.1 x 1.77in Green 70 3.0 x 45mm / 0.12 x 1.77in Black 50 3.5 x 45mm / 0.14 x 1.77in Blue 45 4.0 x 45mm / 0.16 x 1.77 inch Red 40 5.0 x 45 mm / 0.2 x 1.77 inch Blue 25 6.0 x 45 mm / 0.24 x 1.77 inch Blue 20 7.0 x 45 mm / 0.28 x 1.77 inch Red 25 10.0 x 45 mm / 0.39 x 1.77 inch Black 25 13.0 x 45 mm / 0.51 x 1.77 inch Black 20