Trailer Hitch Receiver Extension, 2" to 2" Extension, 8" Length - 3,500 lbs.Features: Ideal for slide-out campers with extended overhangs 2" square tube opening for use with ball mounts and hitch-mounted accessories WARNING: This product can expose you to chemicals including BISPHENOL A (BPA) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.