This is a replacement for the plastic chrome trim that is attached to the the door arm rests on a Scirocco MK1
On most cars the plastic has broken or the chome has peeled away.
There is no OEM replacement for this part that I know of.
Sold as a set, one for each door.

Print in PETG or TPU

You can remove the broken one and replace with this one by using pliers to bend off the outer metal piece which then bends up the o-ring.   Slide the outer metal piece over the o-ring.  Remove the old trim, put the new one on, then straighten out the bent outer metal piece, then re-attach the o-ring with pliers and press the o-ring back into place.