Amvex (An Ohio Medical Brand) Oxygen Click Style Gas Regulator with Dial FlowmeterSelect options above• Amvex click style is available in 50 PSI Preset • YOKE Style (CGA 870 for Oxygen) or CGA Nut and Nipple (CGA 540 for Oxygen)• Green Body with Nipple or DISS OutletAluminum body with brass core to ensure safety (solid brass body is also available) • Built in Flowmeter available in 0-4 LPM, 0-8 LPM, 0-15 LPM, and 0-25 LPM increments ...