The EasyGauge Oxygen Regulator measuring at just 4.5 inches long and weighing 12 oz. The single body design makes it the ideal choice for oxygen users that prefer a gauge-type regulator over a dial regulator. Large numbers on the flow gauge make it easier to see the flow setting gauge. The knurled flow adjustment knob is easy to turn. For maximum safety, EasyGauge Reg features a built-in pressure relief valve as well as a protected contents gauge. The low force Viton yoke seal provides a superior tank-to-reg seal. The unique design minimizes normal flow variation that occurs as tank pressure drops.