Goplus SFR300 Air Pressure Regulator Filter Water Separator w/Pressure Gauge High Quality MaterialThis air pressure regulator is made of nylon, PC and cast aluminum, durable and not easy to get rusty. The maximum air pressure can reach up to 1.0MPa/ 150PSI. Compact and PortableThis tool allows the precise control and the delivery of clean, dry air. Internal diaphragm design smoothes and regulates the airflow, which also minimizes the negative effects of air pulsations and pressure imbalances created by piston-style compressors. Adjustable PressureWith the adjustable pressure control knob, you can pull up and turn the black knob at the top of the regulator to set desired pressure. It will make your work more accurately. Space SavingThis air pressure regulator is compact, it also combines the functions of both air filter and regulator. It is compact and most effective when space is constrained. Easy to OperateThere is a clear dial plate on the tool and it comes with a clear introduction, which makes it very easy to read and use.