●Compatible with 1999-2016 Ford F-250 & F-350 SUPER DUTY PICKUPS ONLY, WILL NOT FIT CAB & CHASSIS. Custom-fit under-bed mounting system. ●Features: Allows full use of pick-up bed area when hauling cargo. Accommodates all standard vehicle suspensions with no alteration of OE exhaust systems. Rail kits are rated to match manufacturers vehicle weight rating. ●Specification: 2-5/16" high strength chrome plated ball standard, 3" ball optional. Rated for 30,000 lbs. gross trailer weight and 7,500 lbs. vertical load, 30,000 lbs. gross vehicle weight rating. Weight Carrying: 7,500 lbs. (TW/GTW). Weight Distributing: 30,000 lbs. (TW/GTW) ●Installation: Package includes all the hardware parts and instructions. Spring loaded safety chain loops included. Professional assembly is highly recommended. ●Constructed from high quality steel and finished in a black powder coating to help prevent rust and provide durability in all-weather conditions.