Small Intake Filters for Rhythm TOC3 Portable Oxygen Concentrators Multibuy:25 Filter Pack A check valve is included

A check valve is included free as well

The AirFit X30i features an UltraCompact oral cushion that works in tandem with X30i nasal pillows

irritation-free seal

Luna TravelPAP delivers personalized Auto-CPAP therapy wherever life takes you--whether you're traveling for business

The OptiChamber Diamond valved holding chamber (VHC) is smaller than most conventional VHC's and incorporates a stepped mouthpiece

Small Intake Filters for Rhythm TOC3 Portable Oxygen Concentrators Multibuy:25 Filter Pack A check valve is includedThis Small Intake Filter, from Rhythm Healthcare, is designed for use with all TOC3 Portable Oxygen Concentrators. The filter, along with the Large Intake Filter available elsewhere on this site, helps to block dirt and dust particles from entering your concentrator's air intake.