Cellulose Acetate Syringe Filters, 0.45 Micron, 50mm, 7-13mm Stepped Hose Barb Connections, 10/Pk (50CP045AN) Sterilize biological fluids, serum or media additives. Sample preparations of aqueous solutions. Sample preparation of protein-based HPLC solutions. High throughput, low binding filter units for non-sterile aqueous filtrations.