Choose from PTFE, polypropylene (PP), or sterile nylon membranes. Use PTFE or PP filter capsules for high-efficiency filtration. Use nylon filter capsules for filtering aqueous solutions. Nylon membranes are hydrophilic and low in extractable; they include a prefilter to prolong the life of the membrane. All capsules feature sturdy PP housings with fused seals-no glues or adhesives to contaminate filtrate. Capsules include a lure lock vent to guarantee that no filtration area is wasted. Use vent to draw solution into the capsule or let air escape from the capsule or sample port. Capsules feature sturdy PP housings with fused seals—no glues or adhesives to contaminate filtrate. Capsules include a lure lock vent to guarantee that no filtration area is wasted. Use vent to draw solution into the capsule or let air escape from the capsule or sample port. Warning: This product is not approved or intended for, and should not be used for medical, clinical, surgical or other patient oriented applications. PTFE membrane is ideal for venting, in-line filtration, and isolation (gas pass, liquids, and aerosol stopped) Autoclavable.