I just cleaned out my computer with some compressed air and noticed a part / piece of plastic came out--It's 2 inches long with a little groove in it (looks like it might slip over something). I don't know if this part was from the case itself or off a component. Don't know if It's for aesthetics or if it actually served a functional purpose. I looked inside the case and I can't see where it would've come off of. Any guesses?