Material：
30166~30167：PVC for mask & tubing, PP for fitting, PE for diluters.
30144, 30145, 30584, 30154, 30155, 30594：PVC for mask & oxygen tubing, PP for fitting, PE for corrugate tubing.
Diluters:
Blue=24%
White=28%
Orange=31%
Yellow=35%
Red=40%
Pink=50%
Description：
30166~30167：Tracheostomy mask w/ 6 color coded concentration jets & oxygen tubing 2m length
30144, 30145, 30584, 30154, 30155, 30594：Oxygen venturi mask w/ 6 diluters
& oxygen tubing 2m length.