Sunset HCS Invacare Perfect O2 Style Foam Cabinet Filters, 10 PackOF9004-10
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Replacement foam cabinet filter for Invacare Perfect O2 Oxygen Concentrator - 10 pack
For best performance the foam cabinet filter should be cleaned monthly, using mild soap and water, and left to air dry completely before re-insertion. Replace as necessary when the foam cabinet filter begins to appear worn or degraded.