1,Dust filter paper bag with high efficiency 2,Low resistance 3,Nice package 4,Free sample TypeOuter paper (Grams per square meter)Inner paper Colour InterpretationSingle layer paper dust bag45g/m3~90g/m3noOrginal and white are usual used,we can also produce specific colourDust filter bag with high effiiciency,which is used in home vacuum cleaner or industrial vacuum cleanerDouble layer paper ...