1,Low resistance 2,Large dust holding capacity 3,Paper frame, environmental protection, low cost 4. MOQ:100pcs FA-001 air filter 1,UsagePre-filtration in central air conditioning(air box) and cabinet ventilation system2,Featurel Low resistancel Large dust holding capacityl Paper frame, environmental protection, low costair filter FA-001 (paper frame) PartFrameFilter mediaDimensionFiltration ...