The B&W Patriot 5th Wheel Hitch is a lighter weight, less expensive, rail-mounted alternative to the B&W Companion. It's designed to give you the smoothest ride on the road. The B&W Patriot 5th Wheel Hitch Coupler is designed for use with B&W Patriot 5th Wheel Hitch Bases; RVB3250, RVB3255, and RVB3270.• 18, 000 Lb Gross Weight Capacity• 4, 500 Lb Verticle Load Limit• Coupler only, base sold separately