Foxnovo PVC PC Cooler Fan Dust Filter Dustproof Case Cover Computer Mesh - 10pcs Color: Black. Material: PVC. Dimension: 120 * 120mm. Suitable for: for the home computer chassis fan dust, speaker speaker grilles and a variety of electrical and electronic products speakers dust protection. Help to keep your PC and PC components clean,minimize the noise from the fan and extend the life-span of your fan. Fits standard 120mm fans or cut for small size. When the fan in your PC blowing cool air inside a computer case, it can also take in dust and dirt.