Borosilicate Glass Filter Funnel with Plain Stem

This heavy-construction filter funnel is made from borosilicate 3.3 glass with a 60° angle, a 50 mm diameter opening, and a plain 7 mm stem measuring 5 cm in length. The heavier-than-standard wall thickness provides improved mechanical strength for extended service under demanding laboratory conditions. Filter paper is required but not included. The borosilicate glass is autoclavable, with heat tolerances of: Strain Point 515°C, Annealing Point 565°C, and Softening Point 820°C.