vacuum cleaner bag has one liner, double-liner, three-liner paper bag for industrial & domestic vacuum cleaner

This kind of vacuum cleaner bag is of

1) One liner, double-liner, three-liner paper bag for industrial and domestic vacuum cleaner2) The filtration from 80-99.97%, at 0.3um

Testing standard: ASTM F1977-04Standard Test Method for Determining Initial, Fractional, Filtration Efficiency of a Vacuum Cleaner System1  DIN 44956-2

vacuum cleaner bag