The heat shrink splice kit comes with 4 transparent heat shrink tubes and 4 butt connectors. All of the components are waterproof, and they work with 14, 12, and 10 AWG submersible wires. These tubes shrink around the wire when heat is applied to connect or terminate a single wire, and these tubes are clear with internal glue coverage so that you can see the connection and visually confirm its quality. | Water Source Heat Shrink Kit