Adhesive Glue Lined 3:1/4:1 Heat Shrink Tubing Waterproof Sleeving Heatshrink
► Heat Shrink Ratio: 3:1 / 4:1: Retraction ratio for these heat shrink tube is 3:1 / 4:1, with good electrical isolation or insulation of the open wires or the connected one. ► Easy to Use: No special tools or expertise are required, just slide the heat shrink tube onto the wire or cable, then heat it with a hot-air gun or lighter, and it will quickly shrink in seconds.