Eisco Glass Volumetric Flask Set, ASTM Class B (250, 500 and 1000 ml)

Set of 250, 500 and 1000 ml ASTM Class B borosilicate glass volumetric flasks with pennyhead stoppers.

• Set of three volumetric flasks with higher 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. 250 ml flask: tolerance ±0.240 ml, no. 16 stopper; 500 ml flask: tolerance ±0.400 ml, no. 19 stopper; 1000 ml flask: tolerance ±0.600 ml, no. 22 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