Ace Glass 8194-228 High Vacuum Easy‑Action Plug Stopcock (0-5 mm Orifice)

High vacuum stopcock for use to at least 3.5 Kg/cm² internal pressure. An ultimate vacuum of 10^-7 can be realized with the standard three O-Rings. Smooth acting semi-needle valve permits fine adjustment of opening. Front O-Ring makes a positive closure against a precision formed heavy glass seat. Hooded handle can be removed from PTFE plug, making plug bakeable. Reference marks on body aid in repetitive setting. Supplied with FETFE O-Rings.