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Scienceware* Safe-Lab* Teflon* Thermometer Adapter TS Stoppers
Teflon* body with Viton* O-ring for air tight vacuum work. The adapter has a threaded polypropylene screw cap on top with an inside O-ring for depth adjustment of 6-7 mm for straight stem thermometers, glass tubing and other items. Rotating the extracting nut removes the adapter from flask. The size 10/18 adapter has no body O-ring.