This professional-grade towing electrical connector offers maximum durability, superior ergonomics and enhanced weatherproofing for long-lasting performance. Protective nylon wire sleeves and heat-shrink tubing provide maximum durability. Superior ergonomics with Easy-pull grip. It has heavy duty connector housings with built-in mounting holes. Includes trailer side molded-in dust cover and grease packet. The 5th wire provides back-up function on boat trailers releasing the surge brakes. 18”L. Three-year warranty.