PYREX 500mL Class A Certified and Serialized Volumetric Flasks, with Glass Standard Taper Stopper-CGW 5680-500

Calibrated to Class A tolerances in accordance with ASTM E542 and E288. Each flask is individually serialized and supplied with a Certificate of Identification and Capacity traceable to NIST standards. The graduation line is sharp and permanent and large white block letters make the inscription easy to read. Supplied with a ST stopper.