MaxxTow Towing Products 70085: Conveniently convert 7-way RV blade connectors to a 4-wire flat connector with this adaptor. Eliminate the need for multiple 7-way corded plugs, blades and adaptors to be converted to a 4-wire flat adapter allowing one to tow various trailers, vehicles and the like with ease and peace of mind. The enclosed inner brass connectors enables a solid electrical conductivity. This unit measures at 3.75″ x 2.75″ x 1.75″. It is encased in weatherproofed hardened plastic designed to last for years on end and for the long haul.