The Bank Vacuum Company HEPA Media and Secondary Filter Set for the mid size Vault canister vacuum. The Bank Vault canister filter set includes (1) secondary motor filter and (1) HEPA media filter. The Vault HEPA media & secondary filter set is constructed with high grade materials to insure peak performance in your mid size canister vacuum. These filters help with odors and eliminate dust while maintaining maximum airflow. We recommend replacing the HEPA and Secondary Filter set for The Bank Vacuum Vault canister once a year or every 12 bag changes.