Eisco Glass Volumetric Flask Set, ASTM Class B (25, 50 and 100 ml)

Set of 25, 50 and 100 ml ASTM Class B borosilicate glass volumetric flasks with pennyhead stoppers.

• Set of three volumetric flasks with lower capacities of 25, 50 and 100 ml
• Made of high quality, heavy duty, borosilicate 3.3 glass for excellent durability and chemical resistance
• Class B tolerances conform with ASTM E288 and E438 standards
• Fitted with a solid glass pennyhead stopper
• Easy-to-read blue specifications and white graduation mark

Conforms to Class B, ASTM E288 standards. 25 ml flask: tolerance ±0.060 ml, no. 9 stopper; 50 ml flask: tolerance ±0.100 ml, no. 13 stopper; 100 ml flask: tolerance ±0.160 ml, no. 13 stopper. Calibrated to contain.

Eisco Labs borosilicate glass has the following heat tolerances:
Strain point 515 °C
Annealing point 565 °C
Softening point 820 °C