Corning® Pyrex® graduated pourout cylinders are calibrated "to contain," and have white enamel graduations. The 100mL capacity is in accordance with ASTM E-133 and E-1272 and is used in ASTM tests D-86, D-216 and D-447. The 10mL size has a funnel top. Bumper guards are supplied with 25mL thru 2000mL sizes inclusive. Nonsterile. Reusable.