Tier1 Replacement for Skuttle 16x25x5 Merv 11 AC Furnace Air Filter 2 Pack Upgraded media rated at MERV 11 to capture 90% of particles, 1-3 microns in size. Replacement for: GeneralAire 14161, 5FM1625, 4511, Skuttle #000-0448-001, Trion / Air Bear 255649-105, 229990-105 and 259112-101. 98% efficient filter media that captures small dust particles before they can collect on your coils This product is listed and rated by Underwriters Laboratories as U.L. Class 2.