Brand new H10 hepa bag fit Electrolux Style C and Perfect Canister Model C101 C103 C104. These bags are HEPA filter material, and are substantially better in filtration then the 4 ply Electrolux paper bags. The HEPA material will capture microscopic particles in the bag, keeping the dust from going into your motor. These bags are highly recommended if you have breathing issues, or allergies. One box has 9 bag.