Ace Glass 8198-20 High Vacuum Stopcock, Easy‑Action Plug, Quick Open, 0-20 mm Bore

High vacuum stopcock with easy action plug that has blunt, flat end instead of the tapered end supplied with 8194 or 8195. This modification means stopcock is a quick opening model versus the variable opening 8194 and 8195. Vacuums of 10^-7 can be realized with standard O-Rings. Plug is NOT bakeable. Supplied with FETFE O-Rings.