... pre-filtration and single-stage filtration in the air systems of household vacuum cleaners, industrial vacuum cleaners, reciprocating air compressors and ... , or two part PU adhesive as the frame end coverFigures of column and squareness, etcLarge filtration area, high dust holding capacity, long ... .Filtration efficiency class: G3, G4, F5, F6, F7, F8 Portable Of Vacuum Cleaner Filter