Genuine Rover Xparts item. See
BHM7012 which many vendors sell as their GSV1073.
In board CV joint(pot joint)gaiter kit metal clips and grease.
The single largest reason for the failure of this rugged assembly is contamination, dirt and moisture will destroy one very quickly. This inbooard CV rubber boot protects the joint at all angles but if your boot shows any sign of cracking or scuffing preventative replacement can save a lot of money.
See
BHM7012 which many vendors sell as their
GSV1073