This 4 pin extension cable is for the CCD reversing camera systems that have waterproof connectors. It is 10m long and comes with a rubber O-ring on the screw fit connector. Together with the rubber boot that goes over the join it gives 2 layers of water ingress protection. We have these cables made to our specification. The cable diameter is 0.5mm with a pure copper and aluminium foil outer shielding. The inner cores are made from pure copper using 12 strands of 0.12mm bare copper. A lot of cable on the market use copper coated aluminium (CCA) or copper coated steel (CCS) which are more easily damaged and give reduced image quality.