Corning Pyrex 5640-1 1ml Class A Heavy Duty Volumetric Round Bottom Flask withCorning Pyrex Glass Standard Taper Stopper (case of 12)

These PYREX 1mL test tube shaped 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. 8 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: 1mL. Flask style: volumetric. Flask shape: round bottom. Top style: standard taper stopper. Neck style: long. Stopper style: hollow glass. Standard taper stopper number: No. 8. Flask feature: heavy duty. Accuracy class: Class A. Feature: reusable. Tolerance: +/-0.01mL. Height: 79mm. Outer diameter: 9mm. Corning #: 5640-1.

• Capacity: 1mL; height: 79mm; outer diameter: 9mm; tolerance: +/- 0.01mL
• Made from borosilicate glass code 7740
• Round bottom volumetric flask has a No. 8 standard taper stopper made from hollow 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