The Eaz-Lift Gooseneck Stabilizer helps reduce movement on your horse trailer, gooseneck trailer or 5th wheel that has a gooseneck adapter installed. It hooks up to the gooseneck and adjusts in height from 30 to 44 Inch. The Gooseneck Stabilizer features a heavy duty steel construction and is powder-coated for maximum rust protection. It also has durable zinc-plated chain and large footpads for added stability. The ball size is 2 5/16- Inch. Maximum load capacity is 7500 Pound Not compatible with vehicles equipped with Anderson Ultimate hitches.