This is a BRAND NEW OEM Aprilaire Air Cleaner Media Filter.  Aprilaire part # 201 and it works in Aprilaire Spaceguard cleaners 2200 & 2250.  This is an OEM Replacement Media Filter- Not a cheap knockoff.  Thanks for looking and good luck!

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This Item is used in Aprilaire Air Cleaner Models: 2200, 2250