Attwood Boat Stern Navigation Light Plug-In Base This highly used base is constructed of die-cast ZAMAK chrome finish. Swivel cover protects the socket when light is stowed away. Socket is keyed to prevent incorrect insertion of pole light. Provides a 2-pin socket and a 12 angle and installs on narrow gunwales or deck areas. Completely non-corrosive, features contacts which are nickel-plated to resist corrosion and multi-crimped for durability, and wire leads tinned for corrosion resistance. Includes 7-1/2" hard wire leads for connection to 12 VDC power supply; Dimensions: 4" long x 1-5/8" wide; 1-3/8" diameter installation hole size;