Buyers products 2-5/16″ hitch ball gooseneck extendor – 3018195 the gooseneck extender from buyers products provides more bed-to-cab clearance and a tighter turning radius with a gooseneck hitch. The 2-5/16″ extenders is zinc-plated yellow for added corrosion resistance. features increases bed or cab clearance from ball. allows more room for tighter turning radius.