Tier1 Replacement for Bryant 20x25x5 Merv 13 Air Filter 2 Pack Upgraded media rated at MERV 13 to capture 90% of particles, 1 microns or smaller in size Replacement for: Totaline P101-2025 and P101-2025A Original box type design This product is listed and rated by Underwriters Laboratories as U.L. Class 2