Curt 1-7/8 in trailer balls are constructed from high-strength steel to match the towing power of your class 1 or class 2 trailer hitch and ball mount and come with fine threads on the shank for improved holding strength. Having a trailer ball that matches your coupler size is absolutely essential. At Curt, our trailer balls are engineered to be precisely fitted. When we stamp 1-7/8 in into the top of each hitch ball, we actually mean 1-7/8 in. This Curt tow ball features a ball capacity of 3500 lb it is able to tow most utility trailers, boat trailers, campers, smaller livestock trailers and some recreational vehicle haulers (note never exceed the lowest weight capacity of any towing component i.e. The vehicle, hitch, trailer, etc). As with any trailer, be sure that your towing equipment is capable of handling the load before hitching up. This trailer ball also features a 1 in shank Dia, a 2-1/8 in shank length, 0 in of rise and a nickel-chrome finish to protect against corrosion and wear. Like all Curt trailer balls, our 1-7/8 in balls are tested for your safety and meet all U.S. VESC specifications.