Any idea what this small tin foil like piece could be? Just noticed it for the first time. Won’t rip off, it’s a tough material whatever it is. Have an email out to the service department that fixed my AC to see what they say. Also unfortunately noticed damage under my car that I can safely say was not caused by myself. Looks like the car was bottomed out at some point in time. Only sitting at 1,600 miles now most of which have been highway.