Volumetric Glassware
Pyrex® Volumetrics are manufactured solely from pyrex borosilicate glass. MBL® volumetric products are manufactured from borosilicate and soda lime glass. Soda Lime glass is generally used for Class B Products.

Volumetric Accuracy and Inscriptions:
Tolerance: | Class A/AS-Highest level of accuracy |
Class B – General purpose work calibrated to a lower level of accuracy | |
Standard: | The standard to which the product conforms |
Graduation | Pyrex® and MBL® volumetric glass is graduated in ml in accordance withISO |
IN | Calibrated to contain |
EX | Calibrated to deliver |
Blowout | Indication that last drop should be blown out of jet |
Temp ◦C | All Pyrex® and MBL® volumetric glassware is calibrated at 20◦ degrees C |
Certification: | All class A/AS works certified glassware bears a serial number for identification and traceability |