Clean Comfort AMP-11-2025-45 - 20x25x4.5 Reusable Filter Frame Kit - Includes Lifetime Reusable Frame MODEL # RFFS 873 and 6 Replacement Filters PART # PP-873 MERV 11. Made by FurnaceFilters.CaReplaces Clean Comfort Part # AMP 11 2025 45, 20x25x4. 5 Actual Size : 19 3 4" x 24 3 4" x 4 3 8" Replacement Pleat Packs PART # PP 873 MERV 11 is for use with Model # RFFS 873 Reusable Filter Frame System is Listed Below. Kit Includes Lifetime Reusable Frame MODEL # RFFS 873 and 6 Replacement Filters PART # PP 873 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