PureFlo SKL Series Capsule, Dual Layer PTFE 1.0um Pre-Filter/0.2 um PTFE Sterilizing Grade Hydrophobic Membrane, Internal Filter Length 2.5", S-Size, Filtration Area 1,250 cm2, ¼” - ½” Tapered Hose Barb (Inlet/Outlet), Factory sterilized by ETO