Aluminum trim. At least that’s a general term. Take it with you to an RV dealer, ideally one who sells and services the same brand.
I have the same pieces on mine. Probably most trailers do. A China bomb bent one of mine. I just straightened it out and moved it over an inch and screwed it back in. Other than that I would carry it to Home Depot or Lowes and ask someone for something similar.
Where did it come off from? If you take that piece to a dealership they’ll probably be able to match it and sell you some. Or an rv repair place
At first glance I thought it was a termination strip, but I think it’s aluminum flat trim molding. You can buy it in black here or in white here or in just the metal color here.
Search for something along the lines of fender skirt trim or something. You can look for that based on your trailer model and hopefully find something. I was able to order a new skirt from the manufacturer for a fraction of the price on eBay and it was an exact match.
Its called a mounding. Any generic molding will so its just a cheap brace for the jwrap.
Your model will probably have an online schematic that shows the parts and their serial number. Go that route.


