Corning® Pyrex® Heavy Wall Filtering Flasks
By Corning
These Pyrex® flasks, without tubulations, are blown in special molds in shapes designed to give maximum mechanical strength. Marked "Filter Flask" to avoid confusion with similar sizes of Erlenmeyer flasks. Graduated to show their approximate capacity. Permanent white enamel graduations and marking spots. Beaded rim uses a rubber stopper.