... Name: Seamless Steel Medical Oxygen CylinderDescriptions:1) material: 37Mn, 30CrMo; 2) water capacity: 2L, 2.5L, 3L, 3.4L, 4L, 4.5L, 5L, 6.7L ... : pcPackaging: 1pc/ctnQty/Ctn: 1pcRelated products: JC1109-2 Aluminum Alloy Oxygen CylinderJC1101 Simple Oxygen MaskJC1108 Humidifier Bottle Seamless Steel Medical Oxygen Cylinder