This is a yellow color 128mm 1 meter PVC Heat Shrink Sleeve for Pack. It can be used to protect, insulate and hold your battery packs to provide stability, electrical insulation, mechanical protection, sealing, and strain relief.

These High performance heat shrink material tubes, bundles, and protects cables; wire and hoses are for a wide range of DIY applications. It is used extensively for cable and wire harnessing, strain relief, insulation, color-coding, identification, and protection.

Simply a great way to create a Flexible, Heat Resistant, and Waterproof tight joint. Just slide a slightly larger tube at the desired location and apply heat through a cigarette lighter, or a heat gun; for about 10 seconds and the tube will shrink down and will hold the joint tightly.