Vintage Pyrex 500 ml Round Bottom Glass Boiling Flask Beaker USA Long Neck

This is a clear, round-bottom flask, made of Pyrex glass, commonly used in chemistry labs. This type of flask is known for its resistance to thermal shock and chemical reactions, making it suitable for heating, mixing, and storing liquids. The flask has a narrow neck and a heavy-duty rim, features often seen in Pyrex Erlenmeyer flasks designed for durability and to reduce chipping. These flasks are used for a multitude of laboratory applications. The graduations on the flask are approximate and should not be used for accurate measurements. Pyrex glassware is made from borosilicate glass, which expands and contracts less when heated or cooled, reducing the risk of breakage. The brand marking on the flask confirms it is genuine Pyrex, distinguishing it from soda-lime glass alternatives. Made in USA. Such a cool piece of history. Welcome to MyEZVintage! Thank you for stopping by! Enjoy looking and let us know if you need help with anything! Pics are part of our description. Please view the ENTIRE listing carefully as we don't offer returns. If you have any questions, please ask us BEFORE purchasing. We're happy to answer you. We videotape all items being packaged and may affix a tamper-proof tag to cut before first wearing/using. Please Note: Due to the nature of vintage/antique items, some may exhibit slight manufacturer flaws and/or light wear/scratches due to their age. This is typical of vintage/antique pieces. Box 46