Disposable devices designed and manufactured with a high-purity polypropylene housing to maintain sample purity. No glue, adhesive, metal, epoxy or other extraneous materials are used in construction. All seals are fused.- Venting Filter, Whatman PolyVENT 500, 0.2m Pore Size, Capsule, SB Inlet, SB Outlet, PTFE, 1/pk Stock Item