Buchner funnel made of high quality, heavy duty, 3.3 borosilicate glass 80ml capacity Funnel features a sintered disc with G-3 porosity Jointed stem. 14/23 cone size Perfect for any science or home laboratory Buchner funnel made of high quality, heavy duty 3.3 borosilicate glass. 80ml capacity. Funnel features a sintered disc with G-3 porosity. Jointed stem, 14/23 cone size. Funnel measures 7.5" in total height. Inner diameter of body measures 43mm and outer diameter measures 46mm. Stem measures 3.3" in length and is 9mm in diameter (at stem end). Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515A°C | Annealing Point 565A°C | Softening Point 820A°C.