R05-Adjustable Oxygen  Venturi  Mask

Tube 2 meters (7ft)
Size:XL(Adult  Elongated),L(Adult),
M(Pediatric),S(Neonatal)
Color:light  green,clear
Color:light  green,clear
Six Venturi Valves for choice:
blue-24%,yellow-28%,white-31%,
green -35%pink-40% ,orange-50%