Check the listing for details. Ever Ready First Aid Oxygen Regulator CGA-870 Gauge Flow Rate with Wrench Key. Color: Green, Condition: New with box. Listed at 24.89 USD. Ever Ready First Aid Oxygen Regulator CGA-870 Gauge Flow Rate with Wrench Key FREE SHIPPING A compact and light weight oxygen regulator is designed to fit any oxygen tank with a CGA 870 style fitting. Made of lightweight anodized aluminum with brass high pressure conduits. CGA 870 OXYGEN REGULATOR A compact and light weight oxygen regulator is designed to fit any oxygen tank with a CGA 870 style fitting. Made of lightweight anodized aluminum with brass high pressure conduits. Designed to be used on oxygen tanks up to 2000 PSI. ADJUSTABLE FLOW RATE Easily adjusts between 12 preset flow settings from 0-15 LPM with a simple turn of the knob. Easy to read indicator shows the current LPM. COMPACT SIZE The regulator measures approximately 4.5" x 2.5" x 1.25", so it won't make oxygen tanks overly cumbersome by taking up too much space. SINGLE BARB OUTLETThe barb design fits securely into tubing and prevents leaks and detachment. OXYGEN KEY INCLUDED Includes durable oxygen key (or wrench) that allows you to open portable oxygen cylinders. Comes with a chain that can be attached to the regulator for easy access.