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Our Erlenmeyer glass flasks are designed to give the best combination of thermal shock resistance and physical strength. Features heavy-duty rims and graduations in durable white enamel with label. Our flasks are versatile, used for holding and measuring liquid samples where a very high degree is not necessary, also suited to mix, heat and boil solutions. Made with Borosilicate glass 3.3 material and uniform wall thickness distribution suited to heat. Compliance with ISO 1773 Laboratory glassware Narrow-necked boiling flasks.