PneumaticPlus DFD-10, Inline filter removes all traces of dirt, dust, water vapor and oil vapor. Ideal for spray painting and any other application requiring clean, dry air. Desiccant changes from blue to pink color when filter needs to be replaced. 125 PSI max. working pressure. 15 SCFM max. airflow capacity. Not reusable. U.S.A. Used at the point-of-use, this patented, disposable, mini in-line desiccant dryer removes all traces of water vapor, oil vapor and dirt. It is often used directly upstream of blow guns or spray guns as final protection of critical parts blow off and paint spraying. A 40 micron, porous bronze element removes fine dirt particles, and oil removing media removes oil vapor, and desiccant beads adsorb water vapor. The see-through housing shows desiccant color change, which indicates that the dryer needs to be replaced.