CamAir CT30 Series Desiccant Air Dryer/Filter System with Stand Base Desiccant removes water vapor down to a dew point of -40°F. Innovative quick change 10 lb. desiccant bag is made of a special fiber media which removes aerosols and solid particles down to an amazing .01 microns. This means there is no need for coalescing or final filters. Built-in color changing indicator lets you know when to change filter . CT30P is designed with an integral base for free standing use. Best choice for portability. 130501