CURT RV Bumper Hitch with 2" Receiver (Fits 4" x 4" Bumper Beams)A CURT RV hitch is a trailer hitch that is designed to mount onto the back of a recreational vehicle to add extra cargo space. CURT RV bumper hitches are coated with a liquid Bonderite coating followed by a gloss black powder coat finish for lasing resistance against wear and corrosion, and they offer a 2" x 2" receiver tube opening. This particular bumper hitch features a gross trailer weight capacity of 3,500 lbs. and a tongue weight capacity of 350