... of the back-e Oxidized aluminum frame, solid structure; metal filter, aluminum mesh, stainless steel mesh dust capacity;, ... capacity2 large dust capacity3 life of 2-3 yearsWashable metal (aluminum, stainless steel) filterAluminum 45,95mmMulti-chip overlap ... wire wound cotton fiber filterPre-filtration efficiency air conditioning system G4, F5A structure strong, washable, interchangeable filter2 life ...