The Intersurgical high concentration oxygen masks, also known as 'partial and non rebreathing masks'. These masks can provide concentrations of oxygen up to 80% at flows of 10 to 15 l/min, these values are approximate and depend on the patients breathing pattern. The Intersurgical high concentration oxygen mask is a non-rebreathing mask, which comes in an adult size, with an innovative Eco designs and a 2.1 Meter oxygen tube.