* Made of medical grade PVC. * Available with 7'anti-crush tubing.Tubing length could be customized. * Two colors for choice:green and transparent. * Oxygen concentration:blue 24%,yellow 28%,white 31%,green 35%,pink 40% and orange 50%. * Adjustable nose clip. * DEHP free and 100% latex free available. * Size: XL, L, M, S. * Packing: 1 pc/PE bag, 50 pcs/carton, carton size:480x360x280mm. * HS Code: 90192000.00