PN#57667  SKU#7593  Electrical Adapter (6 Way Round Vehicle To 7 Way RV Blade Trailer). Material: Blank. Adapts 6-way round (center pin taillights) to fit 7-way RV blade trailer plugs. Simple plug-and-play design eliminates the need for cutting or splicing. 7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power. Spring-loaded dust cover keeps connector clean when not in use. Slit loom keeps wires contained and well protected.