It is made from high-quality amber Boro 3.3 glass, offering exceptional chemical resistance and thermal stability. This Class A certified flask ensures highly accurate and reliable liquid measurements. With its NS 10/19 neck size, it is compatible with a wide range of laboratory glassware, and the PE stopper provides a secure seal. The white scale offers easy visibility of 25 mL measurements, while the batch certification ensures traceability for quality assurance. This pack of 2 is ideal for small-volume laboratory applications requiring precise measurements and accurate liquid handling.