... bags 2.Frame :Aluminum 3.efficinecy :F5 4.Media: Synthetic fiber 5.EN779 class.: F5 ·Large dust holding capacity·High efficiency·Good ... filter Frame: aluminum alloy or stainless steelMedia: Synthetic fiberEN779 class: F5,F6,F7,F8,F9Temp. Resistance:100 degree CelsiusHumidity: 100%Speciality ... different types for choice: 35%,45%,65%,85%and 95% F5 Medium efficiency anti-static air filter