Feature:1. Can be heatshrinked by lighters and hot air guns, shrinks quickly at low temperature. Has high strength and toughness, can be bent at will after heat shrinking2. The outer layer is polyolefin, with the characteristics of insulation, halogenfree flame retardant, low temperature shrinkage, etc.3. The inner layer is hot melt adhesive, come with low melting point, good adhesion, waterproof sealing and mechanical strain buffering4. Suitable for wiring waterproof and air leakage of electronic equipment, the sealing and waterproofing of multistrand wiring harness (such as home wiring harness, automobile wiring harness, etc.), and wire cable branches5. Used for corrosion protection of metal pipelines, repair of wires and cables, wiring waterproof of water pumps and submersible pumps, etc.Specification:Item Type: Heat Shrink Tube RollMaterial: PolyolefinSpecification: Dia20Length: Approx. 100meter / 328.1ftColour: BlackSize Before Shrinking: Inner Diameter: Approx. 21mm / 0.8in 0.7mm / 0.03inWall Thickness: Approx. 0.4mm / 0.02in 0.08mmSize After Shrinking: Inner Diameter: Approx. 10mm / 0.4inWall Thickness: Approx. 0.75mm / 0.03in 0.1mm.Package List:1 x Heat Shrink Tube Roll