SIBATA Class A, Double Scale, To Contain Graduated Cylinders meet ASTM E-1272 Class A, Style I Specifications & USP Standards for Volumetric Glassware. These graduated cylinders feature hexagonal bases for added stability. All cylinders, with the exception of the 2000mL size, come with protective, polyethylene, hexagonal bumper guards. All markings are in durable, white enamel. Key Features ❖ Meets ASTM E-1272 Class A, Style I specifications ❖ Capacities from 5mL to 2000mL available ❖ Hexagonal bases for added stability ❖ Calibrated To Contain ❖ Bumper guards included (except 2000 mL size)