This replacement base fits your B&W Companion fifth-wheel trailer hitch for the Chevy/GMC factory 5th-wheel towing prep package. Unit sits in the sockets in your truck bed for easy installation and removal.Features:Replacement base fits B&W Companion OEM fifth-wheel trailer hitch (BWRVK3710- sold separately)Adjustable pivot arms let you mount hitch head (sold separately) to fit your applicationMove arms fore or aft up to 2" for improved cab clearanceRaise or lower with 3 height settingsPolyurethane bushings on pivot arms offer a rattle-free rideQuick, simple installationDrops into the 4 receiver pucks that are built into your factory underbed railsGray powder coated steel is corrosion resistantMade in the USASpecifications:Gross towing weight: 20,000 lbsTongue Weight: 5,000 lbsHeight setting: 16-3/4" - 18-3/4"Limited lifetime warranty