Corning Pyrex 50mL graduated cylinders are single-metric calibrated "To Contain" (TC) and have white enamel graduations. Height: approximately 225mm. Outer Diameter: approximately 24mm. Graduation interval: 1mL. Tolerance +/-: 0.5mL. Material: Borosilicate Glass Code 7740. Reusable. Not sterile. Pourout top. No stopper. Supplied with plastic bumper guards to reduce accidental breakage (for replacement bumper guards see Cat. No. 3066). 18/Case. Corning #: 3022-50.