Reese 0225.1639 45123 Class V Ball Mount - 5" Drop, 3-1/2" Rise, 13000/1300 lbs. (GTW/TW) Class V Ball Mount Fits 2-1/2" square receiver tube opening Black powder coat finish over A-coat 5" Drop, 3-1/2" Rise 13,000/1,300 lbs. (GTW/TW)