Calibrated to contain

Designed from ASTM Specification E237, Class A serialized requirements.

Flasks have individual serial numbers, a marking spot, and a graduation ring blasted on the neck. Cylindrical body is ideal for better mixing and drainage and for ease in withdrawal of samples using pipets. Sizes 1, 2, and 5mL have a circular base, and 10 and 25mL sizes have a hexagonal base. Supplied with a Certificate of Graduation Accuracy and [ST] ground glass stopper.