This 25mL Florence boiling flask is made from heavy-duty borosilicate glass and features a narrow neck, flat bottom, and beaded rim. No stopper is included. The flask measures 3.25 inches tall with a 1.5-inch bottom diameter, a 2-inch neck length, and a 0.6-inch neck diameter. The borosilicate glass construction is autoclavable with superior chemical durability. It withstands high temperatures and thermal shocks, with heat tolerances including a Strain Point of 515°C, Annealing Point of 565°C, and Softening Point of 820°C. Suitable for heating, reflux, and boiling procedures in laboratory and educational settings.