Oxy3 canistr hepa filter. Enjoy cleaner air in your home with HEPA filtration. Filters 99.5% of dust particles, pollen, and other airborne irritants. Fits all Harmony, Oxy3, and Aptitude models. 1 filter per package. Replacement HEPA filter style H12 for Oxy3 Ultra Canister Vacuum model No. EL7020A.