The Curt 2-inch trailer ball is constructed with precision, finished for longevity and tested for maximum confidence in your towing setup. This tow ball is rated for 7500 pounds gross trailer weight. It has a 2 in. diameter ball to couple to a 2 in. trailer coupler. The stem of this hitch ball is 1 inch in diameter and 2-1/8 in. long. It provides an excellent complement to most class 3 and class 4 hitches. The shank is constructed with fine threads for enhanced torquing and holding strength.