Package includes: 2pcs * 40mm Dust filters <br> Material: PVC; Color: Black <br> Size: 40 x 40mm / 1.6 x 1.6Inch (L * W) <br> Help to keep your PC and PC components clean, minimize the noise from the fan and extend the life-span of your fan <br> Suitable for home computer chassis fan dust, speaker grilles and a variety of electrical and electronic products speakers dust protection.