This B&W Turnoverball Extender is designed for use with our Turnoverball, this ball extender moves the pivot point of your trailer 4" rearward to provide additional cab clearance. Specifications•Compatibility: B&W Turnoverball Gooseneck Hitch Except For Kits 1309 And 1257•Diameter: 2-5/16 Inch•Gross Trailer Weight: 20000 Pound•Finish: Powder Coated•Color: Silver•Material: Steel Delivers Exceptional Durability & Wear Resistance Meets The Highest Quality Standards | B&W Turnoverball 4" Extender