Medical oxygen cylinders are available in the Walk-O2-Bout™. The regulator is built right into the cylinder eliminating the need to inventory, repair or replace separate regulators. This reduces maintenance and administrative costs, and ensures that every cylinder you buy is usable and profitable. Also, the Walk-O2-Bout regulator allows you to set precise flow rates quickly and easily to reduce waste.
Resources: Oxygen (O2) Gas Reference Guide, Gas Cylinder Comparison, Walk-O2-Bout, Oxygen Gas MSDS