BQLZR 120mm Black Plastic Dustproof Case Fan Dust Filter Guard Grill Protector Cover PC Computer Pack of 5 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. Dimension:122 x 122 x 10mm/4.8 x 4.8 x 0.39"(L x W x T)