Stopper, 10/19 – Penny Head, Solid Cone – Borosilicate Glass – Eisco Labs
Solid cone stopper with flat head. Joint size 10/19. Made of high quality borosilicate glass. 1.1″ tall.
Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.



































