Shrink tubes for LED connections (Green Stuff World)Heat Shrink Tube for LED Connections A heat shrink tubing is a flexible plastic tubing that tightens when exposed to heat, and is used to secure the connections between the cables. Due to its size, it is ideal for assembling cables of led lights. After installing the Shrink Tube, use a lighter to secure the connection. Colour: Black Contents: 20 Heat Shrink Tubing for LED Lights