GeneralAire 6FM2025 - 20" x 25" x 5 " Filter Media for MAC 2000, 3000, MAC-L, and Perfect Platform, MERV 11

• Generalaire RESERVEPro Model # 4551 filter media for MAC 2000, 3000, MAC-L, and Perfect Platform air cleaner cabinets
• Nominal size: 20” X 25” X 5”
• Actual size: 20” X 24 3/8” X 5”
• MERV 11 filtration rating
• Manufacturer recommended replacement every 6 months
• Replaces discontinued MERV 10 model # 5FM2025 / 4501
• This is not a replacement for Lennox and Honeywell filters