Oxygen regulator It adopts built-in safty valve for exhaust.The pressure-reducing mechanism adopts piston spring pressure-reducing structure and is disposed longitudinally to make the structure more compact.Fashionable anodized surface treatment,12 levels in adjustment. Output pressure:50PSI Output flow(can be selected):0-4L/min 0-8L/min 0-15L/min 0-25L/min