Fulton Class IV Tri-Ball Hollow Shank Trailer Hitch Ball Mount This Fulton Tri-Ball Trailer Hitch Ball Mount features a hollow shank 2 square receiver tube with three hitch balls. The black powder coated finish provides exceptional durability as well as long lasting use. Fits 2 square receiver tube openings. Features Fit 2 Square Receiver Tube Opening Black Powder Coated Finish Tri-Ball Hollow Shank 3 Year limited warranty Specifications Part Number Description Ball Size Rating GTW TW Length 80