Safe and eco friendly Our heat shrink tubing is made from polyolefin with a 2:1 shrink ratio, shrinking to half of its original diameter to ensure safety and reliability. The material contains no heavy metals or other environmentally hazardous substances, helping protect you and your family from toxins. Cable protection Includes five large sizes for you to choose from, ideal for electrical insulation, wire bundling, mechanical protection, color coding, cable connections, and everyday repairs. Excellent protection Offers good electrical insulation, tight sealing, corrosion resistance, and high temperature resistance. Cover exposed wire sections with these tubes and apply heat with a soldering iron, hot air gun, or a hair dryer (hot enough). The tubes protect wires and deliver a professional repair appearance. Fast and easy to use If you are tired of ugly and unsafe tape wrapped connections, these heat shrink tubes provide a neat, secure alternative. The 2:1 shrink ratio shrinks to half the original size. Shrink temperature is 70 C (158 F) to 100 C, enabling quick organization and storage. Applications - Electrical insulation and wire bundling in household electronics and appliances - Splicing and protecting cable connections - Automotive and outdoor wiring projects requiring moisture and corrosion resistance