Brand new 3/4" compressed air inline moisture filter / separator, oilesser, desiccant dryer combonation. This is a top quality 3 part air filter. The first stage of filtration is a 5 micron filter that removes droplets and debris from your air line, the second stage is a .01 micron oilesser that removes oil and oil aerosol, the third filtration stage is a desiccant dryer which removes any remaining moisture or water vapor from your air line. Using this filter in your air system will provide clean, dry air to the rest of your line and can extend the life of your air tools. This is recommended to those that are running a plasma cutter or a paint gun. Getting moisture in your air lines and tools can be a costly mistake and cause a lot of damage to delicate tools, this filtration system allows you the peace of mind to work without worry!