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Unbreakable polypropylene and high quality borosilicate glass cylinders
Polypropylene cylinders are designed for general use and are chemically resistant. Shatter-proof polypropylene (plastic) labware with easy-to-read gradations are perfect for young scientists!
Bomex cylinders are made from quality borosilicate glass. It has many of the same qualities but is less expensive than Pyrex.