Serological pipette made of high quality, heavy duty Borosilicate 3.3 glass. 5ml capacity, 0.05ml blue graduation lines, marked every 0.5ml. Class B, tolerance, ±0.050ml . Calibrated for delivery to jet. Pipette measures 14.25" in length, and has a body diameter of 0.35". Top has an inner diameter of 4mm and an outer diameter of 7mm. 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.