Shop Nilight RV Bumper Hitch Receiver Fits for 4-4.5 inches Beams 2 inch Receiver 2000 LBS Capacity Bolt-On Heavy Duty Steel for Camper Bike Racks Cargo Carriers in high quality, support 2 Years Warranty. Specifically designed to fit most 4″ to 4-1/2″ Continuous Steel Bumper Beams, and can even be mounted upside down. No need for complicated welding to make the Nilight Hitch Receiver work.