Dutton-Lainson Dutton Lainson Class I Coupler Model 970 1 7/8" Ball. It works with all types of non-passenger carrying trailers with a gross weight that does not exceed 2000 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. Features of Dutton-Lainson 23920 Dutton Lainson Class I Coupler Model 970 1 7/8" Ball Class I Coupler; Compatible with 1-7/8" balls Fits 3" tongues Works with all types of non-passenger carrying trailers Maximum Weight Capacity: 2000 lbs. Housing Width: 3" I.D. x 3-1/4" O.D. Package Contents: Dutton-Lainson 23920 Dutton Lainson Class I Coupler Model 970 1 7/8" Ball Dutton-Lainson 23920: Dutton Lainson Class I Coupler Model 970 1 7/8" Ball