It are made from high-quality amber Boro 3.3 glass, providing excellent chemical resistance and protection against light-sensitive substances. These Class A flasks ensure precise and reliable volume measurements, making them ideal for analytical and research laboratories. The NS 14/23 ground joint ensures compatibility with standard lab equipment, while the PE stopper provides a secure seal. The white scale allows easy and accurate reading of measurements. Batch certification guarantees traceability and compliance with laboratory standards. Supplied in a pack of 2, these flasks offer convenience and value.