Fulton Class II  Straight Trailer Coupler Ball Size 2-Inch Zinc One piece stamped design with Fas- Lok latching mechanism. Z Max 600 Superior Plating finish for maximum protection against the elements. Fits trailers with a 3-Inch tongue mount width and accommodates a 1-7/8 inch trailer ball. 2,000 lb capacity. 1-7/8 inch shank diameter.