Today we're going to review part number RP94623. This is the Reese Goose Box 5th Wheel to Gooseneck Air Ride Coupler Adapter for Lippert 1621 and 1715 pin boxes and it has a 20,000 pound weight capacity. Now this is an air ride coupler which will let you tow your 5th wheel trailer with your gooseneck hitch. Basically this coupler right here, this Goose Box will replace your standard pin box on… see more >