1、The heat shrink tube also has good insulation and flame retardant properties, reliable to use and have long service time. 2、Simple and safe, cover the exposed parts to be maintained with these tubes and use a heating tool to contract them to form a tight, durable seals. 3、Small size, easy to carry and easy to use, including different colors of the hear shrink tube, a total of 328pcs to meet your demands. 4、Can be used for solder joint protection, wire binding and labeling, color coding, headphone and mobile charging cable reinforcement. 5、Suitable for LED filament maintenance, remote‑controlled aircraft, vehicle maintenance, and headbands. 328 x Heat Shrink Tube Item Type: Heat Shrink TubeMaterial: PolyolefinPurpose: Can be used for solder joint protection, wire binding and labeling, color coding, headphone and mobile charging cable reinforcement, LED filament maintenance, remote?controlled aircraft, vehicle maintenance, and headbands.Inner Diameter: Approx. 1mm / 0.04in2mm / 0.08in3mm / 0.12in4mm / 0.16in6mm / 0.24in8mm / 0.31in10mm / 0.39in14mm / 0.55inColor: Black, Red, Yellow, Blue, GreenShrinkage Ratio: 2:1 (to shrink the maximum to 1/2 of its provided diameter)Operating Temperature: -55°C to +125°CMinimum Shrinkage Temperature: +70°CComplete Shrinkage Temperature: Maximum +110°CTensile Strength: 10.4 MPaDielectric Strength: 15 kV/mmQuantity & Size: Approx. 120pcs 1 x 40mm / 0.04 x 1.57in (yellow, black, red, green)60pcs 2 x 40mm / 0.08 x 1.57in (yellow, black, red, blue)32pcs 3 x 40mm / 0.12 x 1.57in (yellow, black, red, green)32pcs 4 x 40mm / 0.16 x 1.57in (yellow, black, red, blue)32pcs 6 x 40mm / 0.24 x 1.57in (yellow, black, red, green)20pcs 8 x 80mm / 0.31 x 3.15in (yellow, black, red, blue)16pcs 10 x 80mm / 0.39 x 3.15in (yellow, black, red, green)16pcs 14 x 80mm / 0.55 x 3.15in (yellow, black, red, blue)