They are available in variety of membrane choices with 0.2 μm or 0.45 μm pore sizes, feature a polypropylene overmold housing, and include both sterile and non-sterile options. Whatman ® ReZist ® syringe filters are specifically designed to be resistant to Chat Now Acrodisc, Minispike Syringe Filter, GHP, 13 mm, 0.45 um,