A non-rebreather mask is a medical device that helps to deliver oxygen in emergency situations. One-way valves prevent exhaled air from reentering the oxygen reservoir. Item NO.: TW8346 Payment: 30% in advance, balance before shipment Product Origin: China Color: transparent green, transparent white Shipping Port: mainly Xiamen or Shanghai, any port in China Lead Timeï¼? 30days Non-rebreathing oxygen therapy mask Non-rebreathing face mask high oxygen concentration with reservoir bag is used in emergency situations to prevent hypoxemia, also known as low blood oxygen. Intended Use To efficiently apply oxygen to the highest concentration Highlights *High oxygen concentration mask *Adjustable elastic *Metal clip tightens the nose *Material: latex free PVC medical grade *With 2M anti-crush tube Item No. TW8347 Size: S-infant/M-child/L-adult/XL-big adult Package Poly bag Packaging & Shipping   Carton Size 49X28X25cm Qâ??ty/ctn 50pcs/ctn Net Weight 5KGS Gross Weight 6KGS Customized Accept! Sea/air shipment, domestic delivery available Our Services Customized tube length and package Fast delivery Application Field Hospital oxygen therapy, COVID-19 treatment