Features: Heat shrink tubing is made from durable material, which has good heat resistance, corrosion resistance, and insulation performances. 2:1 shrink ratio: heat shrink tubes have only half of their original diameter after heating, so they fit snugly and securely to wires and cable, prevent moisture from entering, dust and other impurities and extend life of electronic devices. Easy to use: simply slide the heat shrink tube over the cable, heating it with a hair dryer or lighter, and it shrinks to the desired size in seconds. Widely used: Suitable for electrical insulation, cable bonding, and repairing wires, cable, pipes and electrical and electronic component and more. Whether you need to repair worn charging cables, connecting wires in the car or securing connections in a hobby project, the hose set can skillfully handle all tasks and is an excellent addition to any tool box. Specifications: Material: Rubber Box size: 19.7x13.2x3.6cm/7.75x5.20x1.42inch Heat Shrink Tube Length: Approx. 45mm/1.77inch (other size as shown in the picture) Quantity: 750pcs/780pcs/800pcs Package Includes: 750pcs/780pcs/800pcs Heat Shrink Tube note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.