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Buchner funnel made of high quality, heavy duty 3.3 borosilicate glass. 35ml capacity. Funnel features a sintered disc with G-3 porosity. Jointed stem, 14/23 cone size. Funnel measures 6" in total height. Inner diameter of body measures 33mm and outer diameter measures 36mm. Stem measures 3" in length and is 9mm in diameter (at stem end). Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.