Malawibernd can you help me out here?
What is this, seems odd and I don't exactly know how to approach this.
This is supposedly a two-side ceramicspeed OSBB 46mm, no inside dust cover, it came with this frameset: https://www.specialized.com/pl/pl/s-works-roubaix-sl4-frameset/p/65188?color=174555-65188
Doesn't look like it has a dust cover from the outside, looks like this whole thing is one solid unit you have to hammer out whole, but I am not sure.