Oceanmed Medical offer a flexible and different connecting thread type flowmeter regulators for cylinder. You could choose 1-10 L / min, 1-15L / min two flow ranges. All of the flowmeter regulators have easily accessible flow adjustment knobs. Use durable and accurate. Connecting thread: G 5/8, CGA540, G 5/8, G3 / 4, DIN477 and CGA870.