This 5 ml low form beaker is made from borosilicate 3.3 glass with a spout for controlled pouring. The beaker is ungraduated and features uniform wall thickness for added strength. It stands 1.2 inches tall with an inner diameter of 20.8 mm and an outer diameter of 22 mm. The borosilicate glass is both microwavable and autoclavable with heat tolerances of: Strain Point 515°C, Annealing Point 565°C, and Softening Point 820°C.