... Paper frame, environmental protection, low cost 4. MOQ:100pcs FA-001 air filter 1,UsagePre-filtration in central air conditioning ... holding capacityl Paper frame, environmental protection, low costair filter FA-001 (paper frame) PartFrameFilter mediaDimensionFiltration classMaterialDimensionDescriptionPaper frame(white/grey) ... mediaBased on customer’s requirementsEN 779/G3EN 779/G4 FA-001 air filter