The shell of this BNC connector is galvanized alloy. The inner is copper, and the white is polytetrafluoroethylene. Manufactured connectors long-lasting . Our BNC coupler is suitable for CCTV cameras. The extension cable is used to security cameras, video equipment, and CCTV cameras. This BNC adapter can interconnect two devices with a interfaces, providing coupling between two cable with a BNC female connector, in case you need to extend the length of the BNC cable, and can be used to two male BNC plugs or as a socket converter. It is an economical and efficient that can achieve fast combinations by simply screwing two connectors together, without the need for welding or crimping. With their screw on design, these BNC connectors a hassle installation process without the need for welding or crimping. Get your running quickly.