(Style R) Guardian/Lux 9000 HEPA Filter ReplacementThis Aerus Replacement HEPA Filter, for use with the Aerus and Electrolux Guardian and Lux 9000 models, removes 99. 97% of allergens and other airborne particles as small as 0. 3 micron. This Genuine Guardian Lux 9000 Filter Replacement is for the Aerus and Electrolux vacuum models: Aerus Guardian Aerus Lux 9000 Electrolux Guardian Electrolux Guardian Encore