The SynthwareTM High Vacuum 90 Degree Stopcock With Hollow Plug manufactured by Kemtech America Inc. features precision ground barrel and plug with corresponding numbers. Lower vacuum chamber is evacuated through a 2 mm hole in the plug which is not in the line of flow.
Specification
Bore size: 2 mm Packaging: Pack of 1 ea
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SynthwareTM High Vacuum Straight Bore Stopcock, Bore Size 6 mm, O.D. 12 mm Stem, Plug Size 20/44, Kemtech America Inc. (CAT#: STEM-L-2343-LC)