These Bags Will Also Replace:Hoover A BagsHoover Z BagsHoover A Bags Are Larger Than These Y Bags,but Will Still Work All The SameMicro Filtration2-Ply Filtration System99.7% FiltrationCaptures Microscopic Particles AllergensIdeal for Allergy Sufferers!vacuum bags filter 99.7% efficient down to 5.0 microns and can capture particles as small as 0.1 micron.Original Manufacturer's Part Numbers:64702A-6, 4010100Y, 4010801Y, YTo protect your motor and maintain peak suction power change bags when 2/3 full.When Vacuuming fine particles such as powder, plaster dust, etc., change bags more frequently.Do not reuse or overfill dust bags as a loss of cleaner suction and/or bag breakage may occur.New Item: New Items Have Never Been Used (Single, 2, 3 6 Pack Will Not).These Items are Still Covered Under Our Return Policy.