This 50mL graduated measuring cylinder is made from borosilicate 3.3 glass and meets Class B tolerance of ±1.00mL per DIN EN ISO 4788. It features white printed graduations in 1mL subdivisions, a hexagonal base for stability, and a spout for easy pouring. The cylinder stands 7.75 inches tall with a 2.5-inch wide base. The inner diameter of the cylinder body is 22mm and the outer diameter is 25mm. It is calibrated to contain. Borosilicate glass heat tolerances include a Strain Point of 515°C, an Annealing Point of 565°C, and a Softening Point of 820°C.