Clean Comfort AMP-11-2020-45 - 20x20x4.5 Reusable Filter Frame Kit - Includes Lifetime Reusable Frame MODEL # RFFS 885 and 6 Replacement Filters PART # PP-885 MERV 11. Made by FurnaceFilters.CaReplaces Clean Comfort AMP 11 2020 45, 20x20x4. 5 filters Actual Size : 19. 93" x 19. 68" x 4. 37" Replacement Pleat Packs PART # PP 885 MERV 11 is for use with Model # RFFS 873 Reusable Filter Frame System is Listed Below. Kit Includes Lifetime Reusable Frame MODEL # RFFS 885 and 6 Replacement Filters PART # PP 885 MERV 11. One Replacement Filter lasts Up to 6 Months. Reusable Frame System saves up to 90% of Storage Space and up to 90% Volume of