Description: It's special designed to supply power for tail lights, turn signals and brake lights as well as a ground connection. There is no need for splicing wires, you can extend towing lights without consequently having a dimmer light. Well sealed spring-loaded dust cover protects adapter from elements when leave unused, metal points make good rust prevention and conductivity. Standard flat light connector with trailer ends; For all types of trailers including marine boat trailer, horse trailer, motorcycle trailer, ATV trailer, and other cargo utility trailer hitches . Specification: Color: Black Material: Metal, Plastic Voltage Range: DC 6-24 Volt Screw Thread Diameter: M5x0.8 Screw Size: 22.5x8mm / 0.89''x0.31''(L*Max.D), 43x8mm / 1.69''x0.31''(L*Max.D) 4 Pin Plug Size: 4.3x3.2x1.2cm / 1.69''x1.26''x0.47''(L*W*H) 7 Pin Plug Size: 10x7x7cm / 3.94''x2.75''x2.75''(L*W*H) Package Included: 1 x Trailer Plug 1 x Mounting Bracket 6 x Screw 6 x Nut