Standard Solid, Machined 2 5/16" Replacement Ball
This replacement ball for the Turnoverball Gooseneck Hitch
is 2 and 5/16" and is machined for a tight, rattle-free fit. The
"corners only" fit of the square ball base in the round portion of the
socket allows dirt to fall through the socket, reducing the chance that
the ball might seize up.