Serological pipette made of high quality, heavy duty Borosilicate 3.3 glass. 25ml capacity, 0.2ml blue graduation lines, marked every 2ml. Class B, tolerance, ±0.200ml . 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.