Trailer Hitch Receiver Extension, 2 to 2 Extension, 8 Length - 3,500 lbs.Features:Ideal for slide-out campers with extended overhangs2 square tube opening for use with ball mounts and hitch-mounted accessoriesWARNING: 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.