AO Smith 203371 Replacement Pre-Filter, For Use With: F300 and F50 Series Air Cleaners, 12-1/2 Inch W x 16 Inch H, Aluminum Frame
• Lightweight
• Money saver
• Generic equivalent available
• Multiple uses
• Low maintenance
• Washable
• High standard design
• Easy to install
• Commercial grade pre-filter
• Electronic air cleaner pre-filter