Home / Retail Showroom / Trailer Electrical / Wiring Adapter, 4-Way Flat to 5-Way Wiring Adapter, 4-Way Flat to 5-Way Adapters for a quick switch from one style plug to another when towing multiple trailers. 51-20036 Categories: Retail Showroom, Trailer Electrical, Truck Electrical Product ID: 3557 Related products CASTLE® FIREBALL™ Buy now CASTLE® FIREBALL PLUS™ Buy now DEXTER 23-181 ELECTRIC BRAKE ASSEMBLY RH 12″ 7K Buy now U-Bolt Plate For 3in Round Axles 9/16in U-bolts 117521 Buy now