This cable is for the CCD reversing camera systems that have waterproof connectors. It is 15m long and comes with a rubber O-ring on the screw fit connector. This makes the join waterproof. We have added an 8mm link 1m from the front of the cable. This is made specially for ease of threading the cable through cupboards in motorhomes and caravans. Only an 8mm hole needs to be drilled to pass the cable through. Although the 8mm link is designed to be waterproof we do not recommend it is used in exposed areas.