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510 Bionaire Electret Air Cleaner Replacement Filter

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Bionaire Electret main replacement air filter

• Fits Bionaire models BT204, BT400, BT500, BT500s, and BT501.
• For removal of dust, smoke particles, pollen, and bacteria.
• For optimum performance, replace filter every 3 to 6 months.
• Filter measures 22 1/2" x 4".

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