The all in one is a revolutionary and compact integrated medical valve and regulator system designed for all medical applications. Medical Testing Solutions exceeds the highest international standards for performance and reliability and exceeds ISO 10297, CGA E-18 and CGA V-9.Details All in one is machined from solid brass into a one piece UNI-Body design for strength and years of service. User can initiate flow with a simple turn of the positive click liter flow dial.All in oneliter per minute flow is top of the class at +/- 10% accuracy. The check valve port is pressure operated with a standard soft tip CGA540 hand tight filling adapter. CGA 540 fill adapter is replaceable. Replacements sold separately. Ergonomically designed carry handle simplifies lifting and cylinder handling, meets drop tests, and protects the regulator body and gauge from damage. . Medical Gas Regulators, Oxygen Regulators, Western, Western All In One, Oxygen Regulator, 0-25 Liter Per Minute w/ DISS Male and CGA 540 Fill.