Serological pipette made of high quality heavy duty Borosilicate 3.3 glass. 25ml capacity 0.2ml blue graduation lines marked every 2ml. Class A tolerance ?0.100ml . Calibrated for delivery to jet. Pipette measures 14.25 in length and has a body diameter of 0.6 . Top has an inner diameter of 5mm and an outer diameter of 8mm. Autoclavable with superior chemical durability. Low temperature gradient- can withstand high temperatures & thermal shocks. Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515?C | Annealing Point 565?C | Softening Point 820?C. Eisco Labs proudly manufactures its own products using state-of-the-art equipment and following the highest standards of quality control. Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind. They are manufactured with only the highest grade raw materials and according to international quality standards to ensure that they can withstand use in even the toughest laboratory environments.