Stopcock, Straight Bore, Glass Plug, High Vacuum, 2mm Bore, 12/30 Plug Size, 8mm OD Sidearms, each

Stopcock, Straight Bore, Glass Plug, High Vacuum, 2mm Bore, 12/30 Plug Size, 8mm OD Sidearms. Solid glass high vacuum stopcock with the NEW Chemglass improved constant pressure retention device. This unique retaining system incorporates a glass plug having an extended Snelling which accepts a stainless steel spring and clip. The spring keeps constant tension on the plug at all times and is easily removed and attached. Plug is precision ground and hand-lapped with corresponding numbers on the barrel and plug. Each stopcock is supplied complete with a stainless steel spring and clip. Replacement retention kit consists of one spring and clip for the plug size listed. Made in the United States.