Reese Towpower (21289) Class III Standard 5.25" Drop Ball Mount - Chrome Class III hitch rated for 500 pounds tongue weight and 5,000 pounds gross trailer weight 4 inch rise and 5-1/4 inch drop to level trailer and add to the safety and ease of towing Shank length of 11-1/2 inches allows for turning clearance from bumper to trailer frame Chrome plated for a durable and weather resistant finish Box opening measures 2 inch by 2 inch