Volumetric flasks are available in two different accuracy Classes: Class A and Class B. The two Classes differ in the accuracy of measurement with Class A being the highest accuracy, and Class B is approximately half that of Class A.
Complies with ASTM Specification E288, Class A
Manufactured from borosilicate glass 3.3
Calibrated ""to contain""
Supplied with PTFE/rubber-lined phenolic screw cap