This pack of 12 graduated cylinders is made from borosilicate 3.3 glass and carries a Class A tolerance of +/-0.50mL. Each cylinder has a 25mL capacity with 1mL graduation lines marked every 10mL in white. The hexagonal base provides stable footing on the bench, and a spout facilitates clean pouring. Each cylinder stands 7.75" tall with an inner diameter of 22mm and an outer diameter of 27mm, on a 2.5" base. The borosilicate glass is autoclavable and offers strong chemical durability, with heat tolerances up to a softening point of 820°C. Cylinders are calibrated to contain.