Serum Capsule GF/1.2 um Effective Filtration area: 500 cm2. Dimensions: Housing length: 9.3 cm(3.7 in.). Diameter: 6.3 cm(2.5 in.). Inlet/Outlet Connections: Hose barb fittings accept 12.7 mm (1/2 in.) ID tubing. A membrane capsule for both prefiltration and non-critical final filtration.