PYREX 250mL Heavy Duty Class A Wide Mouth Volumetric Flask with No. 19 Glass Stopper

The PYREX 250mL Heavy Duty Class A Wide Mouth Volumetric Flask is precision laboratory glassware designed for accurate solution preparation, dilution and microchemical analysis. Manufactured from durable PYREX glass, it features heavy-duty construction, a wide-mouth opening for convenient filling and mixing, a permanent graduation line and an interchangeable No. 19 standard taper ground glass stopper. Its Class A accuracy ensures reliable volumetric measurements for analytical chemistry, pharmaceutical testing, laboratory research and quality control applications. Key Features and Specifications - Capacity: 250mL. - Material: PYREX borosilicate glass. - Accuracy: Class A. - Tolerance: ±0.12mL. - Flask Type: Heavy-duty wide-mouth volumetric flask. - Stopper: No. 19 standard taper PYREX ground glass stopper. - Stopper Style: Interchangeable hollow glass. - Base Design: Flat bottom for stability. - Neck Style: Long neck with wide-mouth opening. - Height: Approximately 180mm. - Outer Diameter: Approximately 87mm. - Graduation: Sharp permanent calibration line for accurate volumetric measurements. - Construction: Heavy-duty reusable laboratory glassware. - Wide-Mouth Feature: Facilitates reagent filling, transfer and mixing. - Calibration: Class A volumetric accuracy. - Replacement Stopper: PYREX Series 7650, No. 19. - Manufacturer Packaging: 6 flasks per pack; 6 flasks per case. - Applications: Microchemical analysis, analytical chemistry, pharmaceutical testing, reagent preparation, laboratory research and quality control.