Ancor Heat Shrink Butt Connector, Step-Down, 25pc-12/10AWG (3-5mm²)

4:1 shrink ratio tubing to ensure a watertight seal between wires Flared barrel with uniform copper wall ensures an easy and proper mechanical crimp Crimp indicator on barrel for proper placement of installation tool Clear heat shrink tubing ensures crimp accuracy Coloured stripes on the barrel indicate which crimp die to use, regardless of application Selecting the proper wire terminal for marine applications is important. Please watch the video which explains the difference between single crimp and double crimp wire terminals. It also discusses and shows the proper crimping tool for each application.