1/2" COMPRESSED AIR PARTICULATE FILTER WATER TRAP / PRESSURE REGULATOR / DESICCANT AIR DRYER / COALESCING FILTER FOR COMPRESSED AIR SYSTEMS GREAT FOR PLASMA CUTTER New 1/2" Particulate Filter & Pressure Regulator / Water Trap Compressed Air Line Coalescing Filter and desiccant dryer combo 1/2" FEMALE NPT INLET X 1/2" FEMALE NPT OUTLET THREE Stage unit has added water seperator pre filter to remove larger debris and moisture