Lennox First Choice Liquid Line Compacted Bead Filter Drier with 20 Micron Filtration, 5 cu. in. with 3/8" X 3/8" ODF Connections, 1 to 2.5 Ton Compacted bead construction with 20 micron filtration Maximum moisture and acid removal while protecting POE oil Retains contaminants during system cycling and vibration Filters at both the inlet and outlet ODF solid copper connections for easy install