Hollow Stopper, Hexagonal Top - 10/19 Cone - Flat Bottom - Borosilicate Glass - Eisco Labs

• Hollow stopper made of high quality, heavy duty 3.3 borosilicate glass
• Hexagonal top, flat bottom
• 10/19 cone size
• 0.5" top width, 1.25" total length
• Perfect for any science or home laboratory

Hollow stopper made of high quality, 3.3 borosilicate glass. Stopper features a hexagonal shape top, and a flat bottom. 10/19 cone size.

Stopper measures 1.25" long, and top measures 0.5" wide.

Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.