Cres w/buna-n o-rings for valve and plunger; polytetrafluoroethylene valve seals; autoclavable; produces vacuum for field fitration procedures, where lab vacuum facilities are limited or for transferring liquids without risk of spillage or contamination; incorporates 2-way valve automatically operated by plunger action; inlet and outlet connections are male luer slip for attachment to plastic tubing or to female luer connections as in monitors
