Safe-Lab® Hollow PTFE Stoppers
By Bel Art Products![Safe-Lab® Hollow PTFE Stoppers](https://krackeler.com/tt/lg/graphics/0008/jpg/20197-Series-56.jpg)
Use these hollow PTFE plastic stoppers for boiling and distilling flasks with ground joints. They are easily removed from standard tapered glassware by turning the red extraction nut to apply a safe, gentle and even force against the mouth of the vessel. Stoppers help eliminate accidents and breakage and are autoclave safe at 121°C (250°F).