Corning Pyrex 5640-3L 3L Borosilicate Glass Volumetric Flask - Class A, Heavy Duty, Flat Bottom, ±1.0mL Accuracy with Standard Taper Stopper - Ideal for Chemistry Labs, Scientific Research & Industrial Applications

These PYREX 3L volumetric flasks provide improved lab convenience - broad selection - and precise volume measurement. The strength of these flasks has been increased appreciably through machine-blown bodies to which are sealed heavy-tubing necks tooled for No. 32 standard taper glass stoppers. The graduation line is sharp and permanent and large white block letters make the inscription easy to read. These Class A volumetric flasks have been manufactured to Class A tolerances as established by ASTM E-694 for volumetric ware - ASTM E-542 for calibration of volumetric ware - and ASTM E-288 for volumetric flasks. Material: borosilicate glass code 7740. Capacity: 3000mL. Flask style: volumetric. Flask shape: flat bottom. Top style: standard taper stopper. Neck style: long. Stopper style: pennyhead glass. Standard taper stopper number: No. 32. Flask feature: heavy duty. Accuracy class: Class A. Feature: reusable. Tolerance: +/-1.0mL. Height: 440mm. Outer diameter: 205mm. Corning #: 5640-3L.