1/2" Compressed air in line filter & desiccant air dryer combination FLM12 THIS LISTING IS FOR 1 COALESCING FILTER REPLACEMENT 0.01 MICRON ELEMENT. 1/2" FLM12 & 3/8" FLM38 THIS REPLACEMENT ELEMENT FITS OUR COMPRESSED AIR DESICCANT AIR DRYER / COALESCING FILTER SERIES.