SGF-R20 plastic end cap
A quick learner from 18901 says:
August 1, 2016
Long black plastic trim about 2" wide that caps one side of door.
Tom from SWISCO responded:
August 3, 2016
Could you show me a picture of the trim in question? Please make sure we can see it from the end. You will likely need to remove a small sample to ensure we can see the proper angle. I would also like its exact size, if you can.