Lot of 12 new replacement STANDARD CPAP filters for use with the Resmed S9 series CPAP machine. STANDARD filters are made from Polyester fibers. HypoAllergenic filters are non-woven acrylic and polypropylene fibers with polypropylene carrier. These filters are factory packaged in packs of 2 each. You will receive 6 packs of 2 filters. Our filters are made by one of the country's leading manufacturers of home care supplies and are comparable to the original ResMed filters # 36850, 36851, 36852, 36853.

Each high quality filter measures 2 1/8" x 1 3/8".

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