These graduated cylinders have a single metric scale with raised numerals for easy reading.. Flared top rims and large spouts facilitate pouring.. Octagonal shaped bases prevent tipping and rolling.. Nonwetting polypropylene plastic surface eliminates concave meniscus; makes reading easier and more accurate.. Chemically resistant and autoclavable at 121° C (250° F). Single scale, roll-proof. 33.814 ounce capacity.