18 MICROFILTRATION VACUUM BAGS DESIGNED TO FIT SIMPLICITY TYPE A VACUUMS (5000, 6000 SERIES) ALSO FITS RICCAR 2000, 4000 SERIES VACUUMS AND FULLER UPRIGHTS. THIS LISTING IS FOR 3 PACKS EACH WITH 6 BAGS. THESE BAGS ARE THE BEST QUALITY REPLACEMENT MICROFILTRATION BAGS AVAILABLE. MICRO BAGS HAVE 99.7% FILTRATION AND ARE A MUST FOR ANY ALLERGY SUFFERER BUT AT THIS PRICE EVERYONE SHOULD USE THEM.