Trion Air Bear 259112-102 MERV 11 Filters (3-Pk) - 20x25x5 MERV 11 filtration Nominal size: 20" x 25" x 5" Actual size: 24 1/4 x 19 3/4 x 4 7/8 This is not a replacement for a Lennox furnace filter 3 Pack of a Genuine Trion OEM filter 3 Pack of a Genuine Trion OEM filter 3 Pack of a Genuine Trion OEM filter 3 Pack of a Genuine Trion OEM filter 3 Pack of a Genuine Trion OEM filter 3pack de un verdadero Trion OEM filtro Tamao nominal: 20" x 25" x 5"