The TowSmart 4-Wire Flat Trailer Wiring Connector Set with 48 in. Vehicle End and 12 in. Trailer End provides a guaranteed matched fit. The 4-Wire flat connecter set provides a 4-Wire Flat (trailer end) and 4-Wire Flat (vehicle end) with 18-gauge bonded wire that provide stop, turn, reverse, and taillight functions. Features an ergonomic, durable plastic construction that is corrosion resistant to withstand extreme weather.