It is crafted from high-quality clear Boro 3.3 glass, offering superior chemical resistance and thermal stability. This flask is Class A certified, ensuring precise and reliable liquid measurements. It features a NS 12/21 neck size, compatible with a wide range of laboratory glassware, and includes a PE stopper for secure sealing. The blue scale allows for easy visibility of the 25 mL measurement, and batch certification guarantees traceability for quality assurance. This pack of 2 is ideal for small-volume laboratory applications where accuracy is critical.