* Made of medical grade PVC. * Available with 7'anti-crush tubing.Tubing length could be customized. * Two colors for choice:green and transparent. * Green diluter is for 24%, 26%, 28% and 30% oxygen concentration. White Diluter is for 35%,40% and 50% oxygen concentration. * Adjustable nose clip. * DEHP free and 100% latex free available. * Size: XL, L, M, S. * Packing: 1 pc/PE bag, 100 pcs/carton. * HS Code: 90192000.00