These conical bottom centrifuge tubes from Corning have white enamel graduations and beaded rim. 15 mL and 50 mL tubes are available. 15 mL sizes have 0.1 mL graduations upward from tip; 50 mL size has 0.5 mL graduations upward from tip to 10 mL and 1 mL graduations from 10 to 50 mL.
Specification
Material: borosilicate glass Sterility: non-sterile O.D. × L: 28 mm × 135 mm Capacity: 50 mL