"Combination hitch can be used with couplers and tow ring. Rated towing capacity 10 tons. Includes 2 5/16in. ball and grade 8 mounting hardware. U.S.A. Ball Sizes in. 2 5/16, Overall Length in. 10, Ball Mount Material Steel, Vertical Load Capacity lbs. 4,000, Gross Vehicle Weight Rated lbs. 20,000. 20,000-lbs. max. gross trailer weight 4,000-lb. load capacity Durable drop-forged steel construction Black powder-coat finish prevents corrosion 10in. overall length"