This 1/2" compact desiccant dryer with 2 quart capacity delivers extremely dry, compressed air as low as -30 degrees Fahrenheit. Incoming air is dispensed through a 70 micron polypropylene element for removal of particles. The air is then distributed uniformly through the desiccant to the bottom of the bowl where clean/dry air enters the intake tube. As the beads become saturated, the color changes from blue to pink. Maximum pressure of 250 PSI.