Class A volumetric flasks are made from borosilicate 3.3 glass and feature a graduation mark, polypropylene stopper, and blue or white enamel markings.

• Made of high quality, heavy duty, borosilicate 3.3 glass for excellent durability and chemical resistance
• Class A tolerances conform with DIN ISO 1042 standards for accuracy
• Fitted with a chemically-resistant polypropylene flat-top stopper
• Available with blue or white enamel markings and specifications

Calibrated to contain.

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

Note: Polyethylene stoppers cannot be autoclaved. They have a temperature compatibility range of −40 to +80 °C. Remove stoppers before autoclaving the glass flask body.