During the manufacturing process, it's normal for the coating to look a little chipped away or have rough edges and not cover the stem completely. This is simply part of the manufacturing process of attaching the rubber ball.
THIS IS TOTALLY NORMAL AND DOES NOT COMPROMISE THE QUALITY, OR THE LIFE OF THE PRODUCT AT ALL
We have tens of thousands of RAM Mount products on the shelf, straight from the factory, and they are all almost always like this without exception.
If you have any concerns about your product, please contact us.