Cylinder Measuring Graduated, cap. 1000ml., class 'B', round base with spout, borosilicate glass, Blue Graduation-EIS-CH0344F offers a thoughtfully designed, durable resource for hands-on learning. 1000ml graduated measuring cylinder made of high quality, heavy duty Borosilicate 3.3 glass. Spout for easy pouring, and round base for extra stability. Class B tolerance, ±10.0ml as per DIN EN ISO 4788 standard. Blue printed graduations and specifications. 10ml subdivisions. Cylinder stands 17.75" tall, with a base measuring 4.5" wide. Inner diameter of cylinder body measures 63mm (2.5"), and outer diameter measures 73mm (2.9"). 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. Calibrated to contain.