Bel-art tpx graduated cylinder 286940000, 250ml capacity, 2.0ml graduation, clear, 1/pk clear tpx (polymethylpentene) cylinders are non-wetting to prevent a concave meniscus, making the raised numeral, single scale graduations easy to read. They are shatter-proof with a wide octagonal base to prevent tipping and rolling. Superior chemical resistance and safe for use to 175c (350f) make them a great value. Steam autoclavable at 121c (250f). Made of tpx brand pmp for easy viewing.