Calibrated to contain. Cylinders are made of sturdy borosilicate glass. Scale is durable white ceramic enamel. Yellow and blue ST stopper is made from linear high-density polyethylene and has a closed bottom. The enlarged top of the stopper protects the neck if the cylinder is knocked over.
Cylinders are designed from ASTM Specification E1272, Style 2, Class B requirements.
Ordering Information: Replacement stoppers are available; see the 89000-797 series.