This 35mL Buchner funnel is made from borosilicate 3.3 glass and features a G-3 porosity sintered disc (30mm) for filtration applications. The plain stem has a 6mm diameter. Thick, uniform walls provide increased durability and consistent liquid flow. The funnel measures 6.25" in length with a 1.25" diameter and a stem diameter of 0.25". The borosilicate glass is autoclavable with heat tolerances including a Strain Point of 515°C, Annealing Point of 565°C, and Softening Point of 820°C.