Designed to fit: Fits Eureka original Manufacture bag part number : 61555-12 Eureka Canister Series 970 and 972 Fits these models and others: Eureka Canister Model 970A Eureka Canister Model 972A Item is: Micron filtration Allergy Bag Traps Bacteria, Dust Mites, etc. down to 0. 01 micron At these prices I change my bag once a month whether it is full or not! That gives my vacuum always optimum cleaning performance