Incorporate either the electronic conserving device, the pneumatic conserving device, or standard flow regulators. These systems provide individuals with a convenient, lightweight supply of oxygen. Systems are available with one or multiple M4, M6, M9, MD, or ME cylinders, fiber-wrapped cylinders, shoulder, horizontal, backpack, or fanny pack style carrying bags, cart, regulator, cannula, and supply tubing. All systems are also available with a straight post valve, handtight or a toggle CGA870 valve.