Chrome external thread balls fit right every time and are selected to match: Size of coupler, Gross trailer weight, Thickness of platform, Hole size. Ball Diameter: 1 7/8in.. Shank Diameter: 3/4in.. Shank Length: 1 1/2in.. Max Gross Trailer Weight: 2000lb.. Drawbar Thickness Range: 3/8in.-5/8in.

Warning 
Cancer and Reproductive Harm – www.P65Warnings.ca.gov