This cable has a 4 pin plug one end and a 4 pin socket the other. It is used with our CCD reversing cameras with the 4 pin waterproof connector. There is an O-ring on the female end and when connected with the rubber boot over the joint it gives 2 layers of protection against water ingress. 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.