This is a package of two replacement anti-allergy filters for Mitsubishi's MSZ-FE18, MSY-GE24, and MSZ-GE24 wall mounted mini split indoor units. Product Features Enzyme Catalyst Mitsubishi's anti-allergy filters capture allergens and use an enzyme catalyst to break them down, cleaning your air as it passes through the mini split indoor unit. Product Includes (2) Anti-Allergy Filters Product Compatible With Mitsubishi MSY-GE24NA Wall Mounted Mini Split Indoor Units Mitsubishi MSZ-GE24NA Wall Mounted Mini Split Indoor Units Mitsubishi MSZ-FE18NA Wall Mounted Hyper-Heating Mini Split Indoor Units