It is made from high-quality amber Boro 3.3 glass, providing excellent chemical resistance and thermal stability. This Class A certified flask ensures precise and reliable liquid measurements. Featuring a NS 24/29 neck size, it is compatible with a wide range of laboratory glassware and includes a PE stopper to securely seal the contents. The white scale allows for clear visibility of the 1000 mL measurement, and batch certification guarantees traceability for quality assurance. This flask is ideal for large-volume chemical, pharmaceutical, and educational laboratory applications.