
These are original Philips Respironics branded disposable ultra fine filters. For optimal performance ultra fine filters should be changed regularly when they appear soiled or discolored. Dimensions: Approximately 1.75 (1-3/4) inches long by .875 (7/8) inch wide. These filters were originally manufactured with a small tab on the long edge. Respironics no longer includes the tab as it has been dete ... [Read More]

These are original Philips Respironics branded dark gray / black reusable foam filters filters. For optimal performance foam filters should be washed weekly and replaced every 2-3 months or as needed. Dimensions: Approximately 1.75 (1-3/4) inches long by .875 (7/8) inch wide. Compatibility Information: All PR System One REMstar CPAP Machines (PR System One REMstar Plus, PR System One REMstar Pro, ... [Read More]
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