PYREX 250mL Class A Volumetric Flask Only Without Glass Stopper

The PYREX 250mL Class A Volumetric Flask Only is precision laboratory glassware designed for accurate solution preparation, dilution and volumetric measurements. Manufactured from durable Type I borosilicate glass, it features a heavy-duty machine-blown body, reinforced long neck and permanent calibration line with easy-to-read white markings. Designed to accommodate a No. 16 standard taper glass stopper, this flask is supplied without the stopper, making it suitable for laboratory glassware replacement, analytical chemistry, pharmaceutical testing and quality control applications. Key Features and Specifications - Capacity: 250mL. - Material: PYREX Type I borosilicate glass. - Accuracy: Class A. - Tolerance: ±0.12mL. - Flask Type: Class A volumetric flask only. - Stopper: Not included; sold separately. - Stopper Compatibility: No. 16 standard taper glass stopper. - Flask Shape: Flat-bottom volumetric flask. - Base Design: Flat bottom for stable placement. - Neck Style: Long narrow neck. - Height: Approximately 252mm. - Outer Diameter: Approximately 78mm. - Graduation: Sharp permanent calibration line with large white markings. - Construction: Heavy-duty machine-blown glass body with reinforced neck. - Calibration Standards: ASTM E694, ASTM E542 and ASTM E288. - Reusability: Reusable laboratory glassware. - Manufacturer Packaging: 1 flask per pack; 1 flask per case. - Applications: Analytical chemistry, pharmaceutical testing, standard solution preparation, laboratory research and quality control.