The CURT 5' Adapter Harness is an electrical device that allows a connection to be made between a mismatched trailer plug and vehicle socket. This electrical adapter is designed to adapt a 7-way RV blade vehicle socket to fit a 4-way flat trailer plug. It is constructed from quality plastic and requires no splicing.• Adapts 7-way RV blade vehicle socket to fit 4-way flat trailer plugs• UV-resistant coiled cable extends up to 5' without scraping the ground• Simple plug-and-play design eliminates the need for cutting or splicing• 4-way flat output connects tail lights, brake lights, and turn signals• Durable molded plastic housing resists corrosion Simple plug-and-play design with no cutting or splicing 4-way flat output connects tail lights, brake lights, & turn signals Durable molded plastic housing resists corrosion | Curt 5' Electrical Adapter Harness, 7-Way Blade to 4-Way Flat