Flasks are designed to take 1 atmosphere of vacuum or 29" Hg and are made with a heavier wall than a standard Erlenmeyer flask

• Take rubber stopper
• Manufactured from borosilicate glass 3.3
• Erlenmeyer shape
• Heavy-walled to ensure the mechanical strength needed for vacuum filtration
• With durable white ceramic enamel scale to indicate approximate volumes at various levels

With side tubulation. Sizes 25 through 500 mL accept 7.9mm (⁵/₁₆") I.D. flexible tubing. Sizes 1L and larger accept 9.5mm (³/₈") I.D. tubing. Designed from ASTM Specification E1406, Type II, Class I requirements.