It is crafted from high-quality amber Boro 3.3 glass, providing excellent chemical resistance and thermal stability. This Class A certified flask ensures precise and accurate liquid measurements. Featuring a NS 10/19 neck size, it is compatible with a variety of laboratory glassware and comes with a PE stopper for secure sealing. The white scale ensures easy visibility of 10 mL measurements, and batch certification guarantees traceability for quality assurance. This pack of 2 is perfect for small-volume laboratory applications that require accuracy and reliability in liquid handling.