Bel-Art 201971515 Safe-Lab® Hollow Teflon® Lab Stopper, 24/40 Standard Taper (Pack of 2)
Size 24/40 Safe-Lab® Hollow Teflon® TFE Stoppers for Flasks with Ground Joints. Ideal for use with many types of flasks including distilling and boiling. Included polypropylene extracting nut safely removes the stopper, without risk of glass breakage, from snug fitting ground joints. Chemical resistant and autoclavable at 121°C (250°F) . Joint Size: 24/40. 2/Pack. Bel-Art® #: F201971515.