Replacement Respironics PR System One REMstar Auto Ultrafine Filters without Tab. Quantity: 2 Ultra fine filters are an essential component to your CPAP machine. They remove fine particles like dust and pollen to let you breathe fresh air. These disposable filters should be replaced as soon as there is visible dirt, debris. For the best filter efficiency, replace the filter every month or more often depending on usage and environment. Use with a reusable foam filter for additional filtration. It is placed inside the machine air intake first before the foam filter.
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