Kimax® flask with side tubulation and capacity scale. Flasks are designed to take 1 atmosphere of vacuum or 29" of mercury. Sizes 25mL through 500mL have side hose connection designed to accept 5/16" I.D. flexible tubing. Size 1000mL accept 3/8" I.D. tubing. Designed from ASTM Specification E1406, Type II, Class I requirements. Made with a heavier wall than a standard Erlenmeyer flask.