The oxygen cylinder is made from lightweight aluminum and is easy to transport. The cylinder also has a built-in pressure gauge, so you can easily monitor the amount of oxygen remaining. The cylinder can provide up to 210 liters of oxygen. The regulator has a range of settings from 1/2 to 15 liters per minute, so you can adjust the flow to your individual needs.  The cannula is made from soft, flexible tubing and has two small prongs that fit snugly in your nostrils. The cart is a convenient way to store and transport your oxygen therapy supplies.    Features Lightweight aluminum oxygen cylinder for easy transport Built-in pressure gauge to monitor the amount of oxygen remaining Mini click regulator with a range of settings from 1/2 to 15 liters per minute Shut-off valve for easy control of the flow of oxygen Comfortable and easy-to-use nasal cannula Durable cart with a comfortable carrying handle Multiple compartments for easy storage of oxygen therapy supplies