FirstChoice DBF163S-S11A-EW Bi Flow Drier, 3/8" sweat fit connection, 16 in³ of desiccant volume XH-11A Solid Core FirstChoice filter driers feature: Solid core desiccant Solid copper connectors 3/8-inch sweat-fit connection 680 PSI working pressure Premium rust resistance at 500 hours of salt-spray testing