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External, reusable, foam filter for the 3B Stratus 5 oxygen concentrator. It is recommended to clean the filter weekly with water and mild detergent. Make sure filter is completely dry before inserting it back into the concentrator. Replace the filter every 6 months or sooner if filter wears out.
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🇺🇸 Ship from USA · On Agora since 2025
$6.49