Plastic Dock Bezel
Available in both Black and White variations, all models of the iPod Video came with a White bezel, as did Silver versions of the iPod Classic. Black/Grey iPod Classic’s came with a Black bezel. The Black and White bezels are exactly the same and can be used interchangeably.
The dock plastic can often crack and break after several years of use, replacing it is purely cosmetic, it will not affect the functionality of the iPod. The small piece of plastic is installed in the bottom of the back cover and surrounds the dock connector. It is held in place by two screws.