Features: Heat shrink tubing is make from Soft Plastic, which have 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 firmly to wire 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 wire, cable, pipe and electrical and electronic component and more. Multiple size ensures stable insulation and wire protections for various cable diameters. Specifications: Component: Soft Plastic Quantity: 530PCS/800PCS Box Size: about 19.3x13x4cm/7.6x5.12x1.57inch Package Includes: 530PCS/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 difference between different monitors, the picture may not reflect the actual color.