Corning Pyrex 5640-4L Borosilicate Glass 4L +/- 1.0mL Flat Bottom Class A Heavy Duty Volumetric Flask, with Glass Standard Taper Stopper

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Corning Pyrex 5640-4L Borosilicate Glass 4L Features

• Capacity: 4000mL; height 510mm; outer diameter: 225mm; tolerance: +/- 1.0mL

• Made from borosilicate glass code 7740

• Flat bottom volumetric flask has a No. 38 standard taper stopper made from pennyhead glass - and a long neck style

• Flask provides improved lab convenience - broad selection - and precise volume measurement

• Manufactured to Class A tolerances as established by ASTM E-694 - ASTM E-542 - and ASTM E-288

About Corning Pyrex 5640-4L Borosilicate Glass 4L

These PYREX 4L 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. 38 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: 4000mL. Flask style: volumetric. Flask shape: flat bottom. Top style: standard taper stopper. Neck style: long. Stopper style: pennyhead glass. Standard taper stopper number: No. 38. Flask feature: heavy duty. Accuracy class: Class A. Feature: reusable. Tolerance: +/-1.0mL. Height: 510mm. Outer diameter: 225mm. Corning #: 5640-4L.