It is made from high-quality clear Boro 3.3 glass, offering excellent chemical resistance and thermal stability. This Class A certified flask provides precise and accurate liquid measurements. It features a NS 10/19 neck size for compatibility with a variety of laboratory glassware and includes a PE stopper for secure sealing. The blue scale offers easy visibility of the 25 mL measurement, and batch certification ensures traceability for quality assurance. This pack of 2 flasks is ideal for small-volume laboratory applications requiring high accuracy and reliability in liquid handling.