Büchner funnels with jointed stem and G3 porosity sintered disc made of borosilicate 3.3 glass.

• Made of high-quality borosilicate 3.3 glass that is built to last and withstand multiple uses
• Ground cone on stem affords stability and a tight seal when connected to glassware with compatible joint
• Features a G3 porosity sintered disc
• Straight, thick, uniform walls for increased durability, ease of use, and continual flow of liquid

Borosilicate glass Büchner funnels have a ground cone, straight sides, and G3 porosity sintered discs. Eisco Labs Borosilicate glass has the following heat tolerances: Strain point 515 °C; Annealing point 565 °C; Softening point 820 °C.