Rapidly concentrates 20 mL sample volumes to 0.5 mL. Provides high recoveries, typically > 90%. Low protein-binding Omega™ membrane and polypropylene housing minimize losses due to non-specific binding. Versatile Omega membrane is available in a variety of MWCOs. Built-in deadstop prevents spinning to dryness. Color-coded for easy identification. Best suited for concentrate and desalt proteins, Exchange buffer or remove salt of chromatography eluates, Recover proteins or other molecules from cell culture supernatants.