I have been trying to find out what these are ever since I bought the truck. Previous owner just said he took them to a “guy”. The application, IMHO, is basically to cover up rust spots on the fender lip. Underneath the plastic strip is some sort body wrap that is black. I can’t find anything online that even resembles this material. It does look good and I have had others ask as well. Unfortunately I will be ripping it off to replace with some tinted Monstaliner on the rockers and along the wheel lip, but I possibly wanted to reapply the same application over the liner later on. I will take some close-ups and maybe you will have better luck finding something similar if you are so inclined. I also have a few links stored pointing to something similar that I will find.