Resp-O2™ Oxygen Flow Regulator is designed to deliver oxygen to respiratory patients at adjustable flow-rate levels for easy customization and ideal oxygen output. The oxygen regulator is constructed with a solid, rust-proof brass core and anodized aluminum body—with brass sleeves encasing key component parts for added safety and reliability. A clearly marked dial makes flow rates easy to read and a single-selector knob lets you adjust flow rates smoothly and seamlessly. The Regulators come with a CGA 540-style connection