That looks like a good quality one, mines essentially a run-of-the-mill grinder with almost spear-like blades protruding in it, works very well, but lacks the storage compartment (which I was pissed about) and this filter-option.

P.S What purpose does the filter serve?
GreenGiant07 Reviewed by GreenGiant07 on . Chromium Crusher grinders Anyone tried the Chromium Crusher grinders? They look like they are really good quality, especially for the price. Rating: 5