Z-Line 300AB replacement media #ABP16253, Air Bear Trim Air Cleaner, Air Bear Cub, Part # 255649-101, Part # 229990-001, Part # 229990-101, Part # 248713-101, Can fit in Lennox model BMAC-12C, Replacement Media #255649-101 for Trion Air Bear,  (MERV-11 Universal Cartridge)16 X 25 X 3 (actual size 15 3/4" X 24 1/4" X 2 7/8")