Manufactured from borosilicate glass 3.3. Each instrument is individually calibrated and certified against equipment whose calibration is traceable to the National Institute of Standards and Technology.

• ''TD'' appears on each cylinder and indicates the cylinder is calibrated to deliver
• Double scale features both metric and U.S. customary units
• Scale is durable white ceramic enamel

Tolerances for the various lines on the graduates depend on the inside diameters of these lines, and may be found in the handbook. Designed from ASTM specification E1094, Type 3 requirements.