GeneralAire 12880 - 25" x 20" x 6" #4050 RESERVEPro Expandable Air Filter, MERV 11. OEM filter.

This GeneralAire air filter has MERV 11 filtration and traps airborne particles as small as 1.0 micron.

GeneralAire recommends you replace this air filter every 12 to 24 months to achieve the best results.

Fits Aprilaire 2200 and 2250 Air Cleaners 

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