Overall length less of than 4 and weighs just 6.9 ounces. Lightweight aluminum body with brass sleeve and brass internals. Downward facing outlet port for safety and durability. Easy-click, groove-grip knob with recessed adjoining body area allow for easy flow adjustment for the weak or arthritic patient. Flow window for accurate, confusion-free flow setting. Compact, low-profile contents gauge with gauge-guard standard. Flow Range of .12, .5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8 lpm. Yoke screw stop standard. 100% quality-control testing to ensure reliability Warranty 5 yearsFits M6, M9, D&E cylinders0-8 LPMAlso available in 0-15 LPM and Pediatric 0-3 LPMCompact & lightweightEasy to useSafe and accurate