Listed 1 Inch 25mm 3:1 Waterproof Heat Shrink Tubing Marine Grade Wire Cable …
[Easy and fast] You only need to heat it evenly with a hot air blower or a candle to make it shrink. It is a 3:1 heat shrink ratio and will shrink to the 1/3. with 3:1 Heat Shrink Tubing. [Better protection]: double wall heat shrink tube and lined with glue can better act on the wrapped objects.