This replacement unit fits into your B&W Turnoverball underbed gooseneck hitch to provide the base for the B&W Companion fifth-wheel trailer hitch. Features: Replacement base fits B&W Companion fifth-wheel trailer hitch (BWRVK3500 - sold separately) Adjustable pivot arms let you mount hitch head (sold separately) to fit your application Move arms fore or aft for improved cab clearance Raise or lower with 3 height settings Polyurethane bushings on pivot arms offer a rattle-free ride Wide-stance base offers strength and stability Plastic footpads attach to hitch base and fill truck bed corrugation to create a better fit Quick, simple installation RV post installs in ball hole of B&W Turnoverball gooseneck hitch Gray powder coated steel is corrosion resistant Made in the USA