Oct 29, 2021 · Filter Diameter (mm) 50. Pore Size (µm) 0.22. Body Material Polystyrene. Funnel Size (mL) 250. Adapter Color Yellow. Description Disposable Vacuum Filtration Systems, 0.22um PES, 250 mL; 12/Cs. Key Features. Large membrane diameters (50, 70, and 90mm) and included glass prefilters increase flow rates. Provided sterile and certified nonpyrogenic.