Put a leash on the airborne allergy irritants caused by pets with the Pet Machine Filter by Austin Air Systems. Featuring a 4 stage, 360░ progressive filtering system, this replacement filter for the Austin Air Systems Pet Machine air purifier begins with a large particle pre-filter that blocks hair and pet dander, followed by a medium particle pre-filter for smaller particles like molds, spores and pollen. Next comes a power packed 15 lbs of specialty carbons and zeolite, specifically tailored to absorb pet related odors as well as other harmful chemicals and gases. Finally, a true medical grade HEPA traps 99.97% of particles as small as 0.3 Ám, removing pet allergens as well as dangerous bacteria and viruses. Available in 2 finishes, this filter comes in Black to match your Black, Silver or Midnight Blue purifier; and White to go with your White or Sandstone purifier.