These are the wrap-around bezels which come with the stock S4 MINI.
This picture is only an example. Bezels come and go. All bezels are mechanically good, and grades are based on scratches, blemishes, discoloring, etc.
A Grade (example on right) = A grade bezels are what pass in my QC.
B Grade (not pictured) = B Grade bezels have very slight finish issues that could look OK in most builds.
C Grade (example on left) = C grade bezels have ugly scratches or blemishes that really stand out. They can be painted or refinished. My current C grades are nowhere near as bad as pictured.