... Filter (Cardboard or Aluminum Foil Separator): Up to 99.9999% filtration efficiency, catch 0.3um or above mini ... , with sealant on air inlet side. Up to 99.9999% filtration efficiency, catch 0.3um or above. ... *W*T (MM)AirflowInitial resistanceEfficiencyMaterialMediaSeparatorSealantFrameHS320*320*220500≤220Pa99.99%FiberglassAluminum foil or glued paper boardPU double polyurethaneGalvanized aluminum484 ...