Ace Glass 8190-18 High Vacuum Stopcock with 90 Deg. Arms, Easy‑Action Plug & Tef‑Cap O‑Ring, 0-8 mm Bore

High vacuum stopcock with arms at 90° and Tef-Cap O-Ring seals that eliminate exposure to corrosive materials. For use to 3.5 Kg/cm² internal pressure. An ultimate vacuum of 10^-7 can be realized with the standard three seals. Smooth acting valve permits fine adjustment of opening. Front ring seal makes a positive closure against a precision-formed heavy glass seat. Hooded handle is permanently attached to PTFE plug and is therefore not bakeable. O-Rings are NOT replaceable. Reference marks on body aid in repetitive setting.