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【Insulation Protection】 Dual-size heat shrink tube set, quickly provides tight wrapping for wire joints and cables, achieving reliable insulation and mechanical protection, making electrical connections safer and more durable. 【Uniform Shrinkage】 Made of high-quality polyolefin material, featuring good flame retardancy and corrosion resistance. After shrinking, the tube thickens, offering better wear protection. 【Maintenance & Repair】 When you need to repair damaged wire insulation, organize messy car wiring, or insulate welding points for DIY projects, simply apply slight heat with a lighter or heat gun to achieve factory-like protection, saving the trouble of finding specific-sized tubes. 【Versatile Use】 Common sizes meet different needs, from small wires to main power cables. It is recommended to purchase two sets for backup. 【Easy & Reliable】 Watching messy wires become neat and orderly provides not only safety but also the unique satisfaction of creating perfect protection with your own hands.