Globe Glass graduated cylinders are calibrated TD “To Deliver” and are available in sizes 5mL to 2000mL with Class A calibration tolerance options.Meet ASTM E1272 Style 1 SpecificationCalibrated TD – “To Deliver”Class A calibration tolerance for highest accuracy and the most critical laboratory workPour spout for easy liquid transferBeaded rim for strength and durabilityHigh resistance to chemicalsDual scale metric graduationsDurable white enamel printing A solid hexagonal base provides stability, and an included polyethylene (PE) bumper guard helps to protect against accidental breakage..