Disposable In-Line 4-Stage Desiccant Filter/Dryer Ideal for paint-spraying applications. Removes dust, dirt, water vapor, and oil aerosols that may have bypassed main air filtration system. Blue desiccant bead lowers dew point to -40°F and removes all water vapor. When blue beads turn pink, it is time to replace filter. Bidirectional flow. 3-3/4" x 1-11/16" dia. 1/4" NPT with female inlet and male outlet; can be attached at either end. 15 cfm. Max. pressure: 125 psi. Max. temp.: 130°F. Pkg. qty.: 2.