Safe-Lab™ solid PTFE plastic stoppers with threaded polypropylene extracting nut are for flasks with ground joints. They are perfect for boiling and distilling flasks and are easily removed by turning the red extraction nut to apply a safe, gentle, and even force against the mouth of the vessel, helping to eliminate accidents and breakage. Autoclave safe at 121°C (250°F).
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800-334-7725
office@krackeler.com
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