PMD Products RV 4" Bumper Ultra Hitch Bolt 2" Mount Receiver Adapter Class II 3,500 lb GTW Steel construction works on 4 inch square RV Bumpers Powder-coated rust resistant finish, Zinc Plated Hardware 2 inch Standard Hitch Receiver Tube for Ball Mount, Bike Rack or Cargo Rack Mounting 3500lbs Gross Trailer weight, 350lbs Gross Tongue Weight Rating, Class II Slots in plate for safety chains, Includes carriage bolts, washers and nuts