1、Great Filtering: The water oil separator can filter water and dust, and it from damaging pneumatic tools and accessories, and maintain optimal performance of your equipment. 2、Premium Design: This regulator is equipped with a 0‑150PSI dial gauge, which combines pressure modulation and filtration, making it easy to adjust pressure values. 3、Port Parameter: The air compressor filter has 3 port holes, two 1/4in NPT holes, and one gauge port 1/8in NPT, wide in compatibility. 4、Better Control: The air pressure regulator has a plastic adjustment knob that can achieve smooth flow setting. The knob has a locking function and cannot be turned when pressed. 5、Easy to Install: Comes with a compact size and a light weight as well, the compressor air filter is very convenient to install within minutes.