Trion Air Bear 266649-103 - 20" x 20" x 5" MERV 13 Pleated Air Filter MERV 13 rating Nominal size: 20" x 20" x 5" Actual size: 19.75" x 20.75" x 4.94" Replacement media for Trion Air Bear filter cabinet models 455602-225, 455602-227, 455602-725, and 455602-727 Not a direct replacement for Honeywell or Lennox Healthy Climate filters