Nispira CPAP Inline Filter Viral for Bipap CPAP Machines Resmed, Dreamstation St
Manufacturer Nispira. These inline filters have 22 mm OD/ 17 mm ID on one (Tubing) end and 25 mm OD on the other (Machine) end. It fits standard tubing with outlet size 22mm. We do not accept P.O. Boxes.