Flasks feature wide mouth for easy pipet access and heavy, uniform walls for strength, durability, and safety

All flasks are graduated to Class A volumetric tolerances. Flasks with 5–250mL capacity are calibrated to meet ASTM Specification E288.

Interior bottoms are flat, allowing for efficient stirring with standard stir bars. Large, permanent markings allow for quick, accurate identification. Sold without stoppers.