Heliox regulators are constructed of anodized aluminum bodies with all brass high pressure conduits. These units are available for various helium/oxygen blend ratios and tank connections. Heliox regulators are made in the US and are fully serviceable for extended life. The flow rate and settings for all heliox regulators are as follows: FLOW RANGE 0-20 L/min FLOW SETTINGS 0 | 1.0 | 2.0 | 3.0 | 4.0 | 5.0 | 8.0 | 10.0 | 12.0 | 15.0 | 18.0 | 20.0 Plated brass construction Large 1.5 inch gauge 1.125-12 UNF-2A connection fits MM, M60, M90, M122 cylinders Integrates shut off valve to eliminate the loss of heliox Integrated cylinder fill port Primary outlet for delivery of prescribed dose of heliox Secondary outlet administers medication at 11 L/min