4 Pole Plug Socket Connector with Rubber Cap Normally used with a trailer where only limited functionality taillights. brake lights is needed. Ideal for boat trailers or RVs towing a car on a flatbed trailer. Features: Diecast metal housings Screw terminals accept up to 12 AWG wire. Replaceable interiors Brass split-pin contacts are aligned to assure proper contact and minimal voltage drop Spring-loaded socket doors the plug locks securely into the opening Wiring codes are identified on the insulator Two mounting holes on the flange are 17/64” 6.7 mm in diameter. 2-15/16” 74.6 mm in centers. Mount through a 1 3/8” 34.9 mm diameter hole. With special housing that protects terminals from road splash Specifications: Housing: Plated steel Circuitry: 4 Input Terminals: Brass Contact Material: Screw