Specifications:   2.1 x 5.5mm CCTV Camera DC Power Plug Connector.  DC Power Plug with plastic construction and strain relief.  This 2.1 x 5.5mm Power Plug features one power connector end DC plug male to another end terminal for CCTV camera connected.  It is a perfect solution for those who want to make custom power cable.  This CCTV Camera DC Power Connector will provide a great connection.  Internal diameter of the plug: 2.1mm  External diameter of the plug: 5.5mm  It measures approx. 1.5" long, 0.55" wide, 0.5" thick.  Weight: 6g