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 *