Please note that the estimated shipping time for this item is approximately two to three weeks.Dust can be a computer system's worst enemy as it has the potential to lower cooling performance or cause damage when left overly accumulated. But most fan filters are a hassle to install so SilverStone created an easy to use FF123 fan filter. The FF123 has embedded magnet in its frame so it can be effortlessly attached to any steel chassis without tools. So for those looking for dust reduction for component longevity with increased cooling efficiency the FF123 is an excellent buy.