Fast delivery by the seller. Set consists of eight filters (not seen in the figure 6), which cover the entire body and thus keep dust out of the housing. The individual filter may be secured via adhesive tape on the housing via removable magnet holder (which are integrated in the filter) or. As someone has already said before me: not very cheap, but worth the price. I can only recommend that wants to keep its high-quality Corsair Carbide 540 Air housing free of dust each.
