WhatsApp:+86 158 9016 9579 Web: www.nasalendotracheal.com • Made of transparent soft PVC for good visualization. • Provide various choice to suit different requirement: 24%(Blue),28%(Yellow), 31(White), 35%(Green), 40%(Pink),50%(Orange). • Single venturi valve is available with fixed concentration. • The standard length of tube is 2.1m,and different length is available.