ONLY ONE! Flow-Safe II®+ is the first and only Disposable BiLevel & CPAP System in ONE! This disposable BiLevel CPAP system includes a deluxe full-face mask and manometer for verifying CPAP and BiLevel pressures. Flow-Safe II+ is ideal for transport and is easy to set-up – just attach the oxygen tubing to an oxygen source. In short, the Flow-Safe II+ represents nothing short of a revolution in patient care. Mercury also features the Only One AnapnoGuard™ Cuffill, the most accurate device for measuring both pressure and volume of airway cuffs in all clinical settings.