Soft mask for oxygen therapy with variable concentration Venturi system complete with kit of colored fittings for variation of the concentration of oxygen delivered and anti-crush connection tube.

EACH COLOUR CORRESPONDS TO A PERCENTAGE OF OXYGEN THAT CAN BE DELIVERED (on the basis of the litres per minute supplied):

BLUE = 24% at 2 litres/minute
WHITE = 28% at 4 litres/minute
ORANGE = 31% at 6 litres/minute
YELLOW = 35% at 8 litres/minute
RED = 40% at 8 liters/minute
PINK = 50% at 12 litres/minute
GREEN = 60% at 15 litres/minute

In heat-sealed polyethylene bag