Yescom 17" X 9" Dual Hitch Bicycle Receiver Adapter Trailer Towing Extender Extension w/ 4000lbs Capacity Dual Hitch Bicycle Receiver Extender Extension with 4000lbs. CAPACITY 17" X 9" overall length All steel construction with a tongue weight of 4000 lbs Black powder coated finish and requires a Class III or IV trailer hitch The bottom hitch can be used for towing a trailer, boat or camper while the upper tube can be used to carry a bike rack, cargo carrier or other hitch accessories