(4) CPAP ResMed Airfit P10 nasal pillow system masks (complete mask systems- includes mask tube, 3 different sized nasal pillows and the adjustable head harness). Brand new, packaged and unopened. Retail online value $320.00 - $420.00, depending on site. Each package contains small, medium and large size nasal pillows. Similar packages online going for $100 + per package on eBay, Amazon, CPAP stores (see attached photos). Could last several years, depending on how often you change masks. Cash only. Can meet in North Bismarck or Mandan.