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Stopcock, glass, hollow plug, double oblique,... Precision ground with corresponding numbers on the barrel and plug Lower vacuum chamber is evacuated via a separate 2mm hole in the plug which is not in the line of flow
€58.30 *
Stopcock, glass, solid plug, double oblique,... With solid glass plug. Barrel and plug are precision ground, hand lapped with corresponding numbers on the barrel and plug. With constant pressure retention spring and clip.
€48.30 *
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