We have Nylon Mesh Pre Filter.Frame : Aluminium, G.I. or S.S. Media : PP, PA, PE fibre textile black nylon net EN 799 Class : G1, G2 Efficiency : 65% Features : Large air flow & low resistanceTemperature & moisture resistanceHigh acid & alkali resistanceCan be washed repeatedlyLong service life Applications :Fan UnitDiffuserIndoor EquipmentsACVSClean Room