Limited Lifetime Warranty Length of regulator is 4" and weighs just 6.9 ounces The unit has a standard yoke screw stop Confusion-free flow setting with a flow window for accuracy Easy-click style regulator with a groove-grip knob that has a recessed adjoining body area which allows for easy flow adjustment for weak patients Made of durable lightweight aluminum with brass sleeve and brass internals Accurate, safe and easy to use since it has a downward facing outlet port Flow settings are 0, 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 7, 8 20-micron, sintered-bronze inlet filter. FDA-recommended viton and brass seal washers. All flows tested to accuracy within +/- 15% tolerances. Meets ASTM-G175-03 promoted ignition tests. Inlet pressure: 200 - 3,000 PSI. Outlet pressure: 50 PSI.