CURT 1-7/8 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 we engineer our trailer balls to be precisely fitted. When we stamp 1-7/8 into the top of each hitch ball we actually mean 1-7/8 .This CURT tow ball features a ball capacity of 3 500 lbs. 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 shank diameter a 3 shank length 0 of rise and a nickel-chrome finish to protect against corrosion and wear. Like all CURT trailer balls our 1-7/8 balls are tested for your safety and meet all U.S. VESC specifications.