Large Tank Oxygen Pressure Regulator/Americal-Style Medical Oxygen Regulator: This medical oxygen regulator is preset to 50 PSI for ideal use with a veterinary anesthesia machine and may be used on large oxygen tanks such as H or K tanks. A male DISS-F connector allows easy connection to any O2 hose equipped with a DISS-F connector. It can be used humifier bottle.and adjust flow rate from 0-15lpm.