PYREX 250mL Class A Volumetric Flask with No. 16 Standard Taper Glass Stopper

The PYREX 250mL Class A Volumetric Flask with Standard Taper Glass Stopper is precision laboratory glassware designed for accurate solution preparation, dilution and volumetric measurements. Manufactured from durable borosilicate glass, it features a heavy-duty machine-blown body, reinforced long neck, permanent graduation line and No. 16 standard taper hollow glass stopper. Its Class A accuracy provides reliable measurements for analytical chemistry, pharmaceutical testing, reagent preparation, research laboratories and quality control applications. Key Features and Specifications - Capacity: 250mL. - Material: PYREX Type I borosilicate glass. - Accuracy: Class A. - Tolerance: ±0.12mL. - Flask Type: Complete Class A volumetric flask. - Stopper: No. 16 standard taper PYREX glass stopper. - Stopper Style: Hollow glass. - 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 heavy-tubing neck. - Calibration Standards: ASTM E694, ASTM E542 and ASTM E288. - Reusability: Reusable laboratory glassware. - Manufacturer Packaging: 6 flasks per pack; 12 flasks per case. - Applications: Analytical chemistry, pharmaceutical testing, standard solution preparation, laboratory research and quality control.