Perfect size for small oxygen tanks at approximately 4.5 compared to the 6 of typical regulators * Made with an aluminum body and all brass core this regulator is durable and safe for any user * Portable and safe at 4.5 and made of aluminum and brass * Comes with viton yoke seal with outer ring constructed of brass * Includes CGA-870 inlet connector and hose barb * Easy to read dial in-flow settings with ribbed flow selector to give users an easier grip * Flow rate: 0-15 LPM; includes settings of 1/8 1/2 1 2 3 4 6 8 10 and 15 * Limited two-year warranty *