This ad is for an OEM Ford Mustang Left Rocker Panel End Cap. 

Part Number: F6ZX-63100A55-ABW
Color: Ultra White 

I think this item will fit only the 1996-1998 Ford Mustang all Models (It is best to check with the dealer before you buy to make sure it will fit your Mustang Model).There are cosmetic flaws on it.
Since I have several of these, please put in mind that you will receive one that has blemishes in other places than the one you see on the pictures of this ad. It might have more blemishes and scratches than the one you see on the pictures of this ad. I assume you are going to repaint it.