Most Headlamp bowls are supplied with a screw fitting at the bottom of the headlamp bowl, the MGB and many others have no access to this so often the rims don't fit or just fall off 

The Tudor chrome headlamp rim clips onto the bowl all the way around meaning it correctly fits .

You will receive all the parts to fit you just need to add your chosen lamp and wiring loom .

The New Tudor Headlamp rim is a new O/Equality item commissioned exclusively by Tudor . 

This is for a pair.