12 joint centre parts. Black rigid plastic. Made to fit exactly as originals. Must be used in pairs; therefore this is for 6 sets. This is 3 with 3 prongs and 3 with 4 prongs for the different fittings
If your joint no longer clicks\stays in position, or you've lost any of the supplied centre parts, or you'd just like to have a set 'just in case'..... then these are a must for you.