Genuine Allergen Filtration vacuum bag designed to fit Hoover Duros Canister vacuums using Type SR bags. Allergen filtration Designed to fit Hoover Duros Canister models S3590, S3591, S3590HV and sanyo SC-S700P, SC-S700 and Powerstar Seneca vacuums. Type SR bags Captures 99.7% of microscopic particles A must for allergy sufferers 3 Per package