Marine Medical International supplies a wide variety of oxygen systems. We can assess your needs and help you determine the proper setup. We use basic fixed flow (6 liter per/min) and variable flow (0-15 liters per/min) regulators. Our oxygen cylinders vary from 150 liters (approx. 15 minutes) to 3750 (approx. 5 hours). Feel free to call or e-mail your questions and we will we assist your requests immediately.