Cylinder Measuring Graduated, cap. 25ml., class 'B', detachable plastic hex. base with spout and protection collar, borosilicate glass, Blue Graduation-EIS-CH0346B offers a thoughtfully designed, durable resource for hands-on learning. Capacity 25ml .5 ml graduations Tolerance: ±0.50 ml Protective collar Class 'B' Borosilicate glass, Class - B, detachable plastic Hexagonal base with spout and protection collar. As per DIN EN ISO 4788 standard. Capacity: 25 ml, Sub Div.: 0.5 ml, Tolerance: ±0.50 ml Eisco Labs Borosilicate glass has the following heat tolerances: Strain Point -515°C | Annealing Point 565°C | Softening Point 820°C.