... Vacuum cleaner filter is Widely used as the pre-filtration and single-stage filtration in the air systems of household ... internal combustion engines.Excellent chemical fiber nonwoven used as the filter core materialABS, PP, PC, PVC plastic frame, or ... end coverFigures of column and squareness, etcLarge filtration area, high dust holding capacity, long life (washable), economical, utility, easy to ...