Medical grade pvc adjustable density venturi oxygen mask

1.Made of clear soft PVC non-toxic, non-pyrogenic
2.200cm oxygen supply tube
3.Size: S,M,L,XL
4.Concentration : 24%,26%,28%,30%,35%,40%,50%
5.Mask with adjustable nose clip ,assures comfortable fit
6.Mask with elastic strap ,comfortable and easy to use
7.Individual PE package
8.Sterilized by EO gas
9.CE, ISO 13485 approved
10. Free sample
Have different sizes, suitable for infant, children and adult.