The oxygen concentration can be selected from 
Blue:   24%
Yellow: 28%
White:  31%
Green:  35%
Pink:   40%
Orange: 50%

All materials used in construction of the Oxygen Mask ,and the Oxygen Tubing are latex free, soft and smooth surface without sharp edge and object, They have no undesirable effects on the Oxygen/Medication passing through under ordinary conditions of use. 

Size:  Adult Elongated,  Adult,  Child Elongated, Child