Polypropylene, nylon, and PTFE membranes are ideal for sample preparation and small volume chemical filtration. Ideal for sterile filtration Manufacturing process certified to ISO 9001 Biosafe according to Class VI plastics tests Syringe filters with cellulose acetate or polyethersulfone membranes are ideal for sterile filtration of buffers, tissue culture media or additives, and other biologicals. The polyethersulfone membrane offers high flow rates. Nonsterile syringe filters are excellent for HPLC applications. Each filter has a female Luer-lock inlet and a male slip Luer outlet. Ordering information: Nylon membrane filters 89041-306 are bulk packed in bags of 1000, four bags to a case. Caution: Note: PTFE membrane is hydrophobic and not intended for use with aqueous solutions.