These 100mL PYREX® conical centrifuge tubes have white graduations and are used in accordance with standard methods of testing for water and sediment in petroleum products. These tubes are graduated upward to 0.5mL in divisions of 0.05mL; from 0.5mL to 2mL in divisions of 0.1mL; from 2mL to 3mL in divisions of 0.2mL; from 3mL to 5mL in divisions of 0.5mL; from 5mL to 10mL in divisions of 1mL; from 10mL to 25mL in divisions of 5mL and at 50, 75 and 100mL. Reference: ASTM D-96, D-91, D-893 and D-1796.