Capsules feature sturdy PP housings with fused seals-no glues or adhesives to contaminate filtrate. Capsules include a luer 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. PTFE membrane is ideal for venting, in-line filtration, and isolation (gas pass, liquids, and aerosol stopped) Autoclavable