These volumetric flasks are constructed of low-actinic amber glass, providing protection for substances that are sensitive to light. Each flask features machine-blown bodies and heavy-beaded, heavy-tubing necks that are tooled for standard taper glass stoppers. Each volumetric flask is supplied with a standard taper glass stopper which provides a leakproof seal. This airtight seal not only preserves the integrity of your samples but also enhances the reliability of your volumetric measurements * Low-actinic amber for light sensitive materials * Made of premium borosilicate glass with a low coefficient of expansion * Designed “to contain” with a temperature of calibration at 68°F (20°C) * The graduation line is sharply defined and of uniform width * Each flask has a large marking square and includes a glass stopper * Wide range of sizes available (10 mL to 1000 mL) * Meets ASTM E-288 Class A specifications & USP standards for glassware SPECIFICATIONS: * Autoclavable: True * Capacity: 25 mL * Color: Amber * Dimensions (L x W): 39 x 122 mm * Material: Borosilicate Glass * Quantity: Pack of 6 * Volume: 25 mL * Warranty: 1 Year