Features 100% brand new and high quality. Mainly used for insulation protection of wire core, solder joints, inductors, also for rust prevention and corrosion protection of metal pipes. The heat shrink tube would shrink and wrap the protected things tightly if heated under high temperatuer. Easy to use - select the appropriate tube, put it on the wire joint and heat it to make it shrink with an air heater. Flame retardant, wear resistant, with good sealing ability. Features: 1. 100% brand new and high quality. 2. Mainly used for insulation protection of wire core, solder joints, inductors, also for rust prevention and corrosion protection of metal pipes. 3. The heat shrink tube would shrink and wrap the protected things tightly if heated under high temperatuer. 4. Easy to use - select the appropriate tube, put it on the wire joint and heat it to make it shrink with an air heater. 5. Flame retardant, wear resistant, with good sealing ability.   Specification: Material: XLPE (crosslinked polyethylene) Quantity: 100pcs Color: Green, Blue, Yellow, Red, Black Package weight: Approx. 31g/1.1oz   Package list: 20 x Heat Shrink Tube 1.0mm*100mm (4pcs per color) 20 x Heat Shrink Tube 1.5mm*100mm (4pcs per color) 20 x Heat Shrink Tube 2.5mm*100mm (4pcs per color) 20 x Heat Shrink Tube 3.0mm*100mm (4pcs per color) 20 x Heat Shrink Tube 5.0mm*100mm (4pcs per color)   Note: 1. Due to the difference between monitors and light effects, the pictures may not reflect the actual color of the item. 2. Please allow slight error due to manual measurement. Thanks for your understanding. Package List