The Airgas® MediSelect II regulator is designed for use with high pressure medical gas cylinders equipped with medical CGA-540 or CGA-870 cylinder valves. They regulate the flow of medical gases to the patient or instrument in liters per minute (LPM). They are intended for the administration of medical oxygen gas in the treatment, management, diagnosis evaluation and care of the patient. The Airgas® MediSelect II regulator has an easy to read flow selector visible from two sides. The pressure gauge rotates around the body to provide best viewing regardless of the orientation of the source cylinder. The outlet hose barb also rotates around the body to better enable orientation of delivery cannula or mask hose. This regulator was designed specifically to provide “ease of use” for medical professionals