Karter Scientific Plastic Graduated Cylinders are manufactured from roll-proof and easy-to-read polypropylene plastic. Single metric scale has blue printed numerals and graduations. Flared top and large spout facilitates easy pouring, and hexagonal shaped base prevents tipping and rolling. The nonwetting polypropylene surface eliminates concave meniscus and makes reading easier and more accurate. Chemically resistant and autoclavable at 121 degrees C (250 degrees F). Many sizes and quantities to choose from. Sizes range from 10 - 1000ml.