Replacement desk foot for Gresham Design 2000 desk

The ball-and-socket adjustable feet on the Gresham desks tend to break up after a while, this is a replacement for the plastic outer which will fit onto the existing metal ball and bolt.
The ball-and-socket adjustable feet on the Gresham desks tend to break up after a while, this is a replacement for the plastic outer which will fit onto the existing metal ball and bolt.