Pro Series 80425 Trailer Hitch Tri-Ball Ball Mount Class III. Fits 2 inch receiver, 2000 pound gross trailer weight/ 2000 pound tongue weight (For 1-7/8 Inch Ball)/ 6000 Pound Gross Trailer Weight/ 600 Pound Tongue Weight (For 2 Inch Ball)/ 10000 Pound Gross Trailer Weight/ 1000 Pound Tongue Weight (For 2-5/16 Inch Ball). Non-Swivel, Non-extendable 8 inch hollow shank. Tri-ball is 1-7/8 Inch And 2 Inch And 2-5/16 Inch.