Dri-Eaz Defendair HEPA 500 Filter Kit $159.99 Kit Includes: 1 x F321 Size HEPA (Actual Size: 16" x 19" x 2.25") 3 x F271 Size MERV 8 Pre-Filters (Actual Size: 15.75" x 15.75" x .75") Free Shipping Quantity 1 2 3 4 5 6 7 8 9 10+ Quantity Add to cart Buy Now