... permeability; 3.With fast,medium,slow speed. Ashless filter paper Description SpecificationInner PackageOuterPackage ashless filter paper(fast,medium,slow speed) 70mm100sheet/box50boxes ... paper(fast,medium,slow speed) 150mm100sheet/box 50boxes/ctn ashless filter paper(fast,medium,slow speed) 185mm100sheet/box 50boxes/ctn ...