Eastwood's air management systems were exclusively designed to deliver the driest air with maximum efficiency. This 1/2" NPT 2 stage economy desiccant drying system includes oil separator coalescing filter with sight glass and pop-up indicator. One quart desiccant dryer disperses air through a 70 micron element and evenly into the desiccant bed. Water vapor is absorbed producing a -40+F pressure dew point. Clear indicator sight glass shows desiccant efficiency. Includes 1 quart desiccant, shut-off valve and mounting hardware.