Yosoo 2Pcs 120mm PC Computer Fan Cooling Dustproof Dust Filter Mesh Strainer Case Aluminum Help to keep your PC and PC components clean, minimize the noise from the fan and extend the life- span of your fan. High quality aluminum filter with stainless mesh for 12cm PC Case Fan When the fan in your PC blowing cool air inside a computer case, it can also take in dust and dirt. Size Approx. 120mm x 120mm Package: 2 x Dust Filters