1EASY TO READ: This regulator is equipped with a 0 to 1 MPa pressure gauge, making it effortless to adjust the pressure values with clear readings. 2PORT SIZES: The air compressor regulator features three ports, with two 1/4in NPT ports and one gauge port of 1/8in NPT. 3ADJUSTABLE KNOB: The pressure regulator has a plastic adjustment knob that allows for smoothly and accurate flow control. The knob also has a locking feature, preventing accidental adjustment when pressed. 4ACCURATE MEASUREMENT: The air compressor pressure regulator provides accurate gas flow regulation and accurate measurements of gas levels. 5DURABLE BUILD: Made with premium metal materials, the regulator is built to last and withstand the demands of pneumatic applications.