Cole-Parmer® Class A Borosilicate Glass Volumetric Flasks deliver high-precision liquid measurements for analytical and research labs. Made from chemically resistant borosilicate glass, they withstand thermal shock and repeated sterilization. The high-contrast, permanent markings ensure accuracy, while the glass stopper provides an airtight seal for contamination-free storage. Autoclavable and reusable, these flasks are built for long-term, reliable use.

For mid-range volume preparation, the Cole-Parmer® 250 mL Volumetric Flask provides accuracy and durability. Its secure glass stopper ensures contamination-free mixing, making it ideal for research, calibration, and solution standardization.