The polypropylene (PP) membrane is a hydrophilic, low-binding material ideal for protein and peptide-based samples. Does not require pre-wetting for aqueous samples. Filter inlet can be connected to either a Luer slip or lock syringe. Filter outlet can accommodate a Luer slip needle or other connector. Polypropylene housing, 25mm diameter, 0.2um membrane, 100/pk. Not compatible with hexane, toluene and benzene; limited compatibility with chloroform and dichloromethane.