Stopper, 14/23 – Penny Head, Solid Cone – Borosilicate Glass – Eisco Labs
Solid cone stopper with penny head. Joint size 14/23. Made of high quality borosilicate glass. 2″ tall.
Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.



































