Safe and reliable performance No toxic gases are emitted during use, and the degradation time is greatly shortened, contributing to safety for you and the environment. The material also offers fireproof, waterproof, and voltage resistance properties, making it a trustworthy partner in electrical engineering. 2:1 shrink ratio for versatile fit The heat shrinkable tubes have a 2:1 shrink ratio, allowing them to closely fit wires and cables of various shapes, provide strong insulation for bare or connected wires, and extend the service life of your wiring. Easy installation for all users No special tools or expertise required. Simply slide the heat shrink tubing over the wire or cable, then apply heat with a heat gun or lighter and it will shrink quickly in seconds. Suitable for both professionals and home DIYers. Wide range of applications Ideal for electrical insulation, wire bundling, color coding, mechanical protection, and wire/cable splicing and routine maintenance. Suitable for automobiles, home furnishings, audio and video setups, ships, and other fields. Practical use scenarios Automotive wiring: insulate and protect wiring harnesses to improve reliability and reduce wear. Home theater and AV installations: bundle and colorcode cables behind TVs and receivers for neater, safer setups. Marine and outdoor gear: protect exposed cables on boats or outdoor equipment from moisture and abrasion.