1、EFFICIENT FILTRATION: The air filter can filter small particles and dust in the air, with high filtering efficiency, and maintain the air dry and clean. 2、PRESSURE REGULATION: Pull up on the top button and rotate clockwise to increase pressure, or rotate counterclockwise to release pressure. 3、STANDARD THREAD: This air filter has standard G3/8in air inlet and outlet thread, which ensure a secure connection and no air leakage. 4、PRESSURE GAUGE: The air filter is equipped with a pressure gauge, clear and intuitive, the recommended pressure is 0.1‑0.85Mpa. 5、DRAIN FUNCTION: The air filter regulator has drain function, supports differential pressure and automatic drainage, efficient and durable.