The oxygen masks convey oxygen or the steam to the patient connected with respiratory system.Made of medical grade PVC: Clear soft, non-toxicWith Adjustable nose clip.With elastic strapMedium concentration.Tube Length: With 2m tubing/without tubing or any length.Certificate: CE&ISOSterile: EO gasFeature: Easy to tear open, prevent leakage, waterproofSize: XL, L, M, S, XS.Jar: Both 6ml and 20ml nebulizer jar is available.Packing:1pc/ PE bag within products specification; 100pcs/CTNWE WILL REPLY YOU AT ANY TIME!http://accenterprise.en.made-in-china.comMobile: +86 18756699011