SHERWOOD "OXYGEN-1" INTEGRATED VALVE AND REGULATOR COMBINATION FOR PORTABLE OXYGEN DELIVERY SYSTEMS, FLOW RATE 0-25 LPM, NYLON/ABS SHROUD, CONTENTS GAUGE, 100% LEAK TESTED, MRI TESTED TO 3 TESLA3360 PSIG CG4 PRESSURE RELIEF DEVICE, 3/4" -16 UNF2A INLET THREADS, UNIQUELY SERIALIZED PER UNIT