Tier1 Replacement for White-Rodgers 16x25x4 MERV 8 FR1400M-100 Comparable Air Filter 2 Pack Rated at MERV 8 to capture particles 3-10 microns in size Replacement for: White-Rodgers FR1400M-108 and FR1400M-111 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