Dutton-Lainson 13889 Class II Coupler (Model 981) is compatible with a 2″ ball and fits a 2″ tongue. It works with all types of non-passenger carrying trailers with a gross weight that does not exceed 3,500 lbs. Coupler includes a pin and chain. The housing width is: 3″ I.D. x 3-1/4″ O.D. Features a zinc plated TUFFPLATE finish.Class II Coupler; Compatible with 2″ ballsFits 2″ tonguesWorks with all types of non-passenger carrying trailersMaximum Weight Capacity: 3,500 lbs.Housing Width: 3″ I.D. x 3-1/4″ O.D.