"Air Pressure Regulator Combines an Air Compressor Filter With a Reusable 1 Micron Element. 150 PSI and 1/4""NPT. Optimize your job with this combo unit. The water separator features a heavy duty yet compact design making the compressor air dryer tough enough, traps water vapor and dust to maximize the performance of air compressor tools for cleaner and more even jobs providing excellence in execution. for all shop conditions yet ergonomically designed not to get in your way."