PYREX 25mL Economy Class B Volumetric Flask with No. 9 Standard Taper Glass Stopper

The PYREX 25mL Economy Class B Volumetric Flask with Glass Standard Taper Stopper is durable laboratory glassware designed for routine solution preparation, dilution and volumetric measurements. Manufactured from PYREX glass, it features a flat-bottom body, long narrow neck, permanent graduation line and interchangeable No. 9 standard taper ground glass stopper. Its Class B accuracy provides an economical solution for educational, chemical, pharmaceutical and research laboratories where Class A precision is not required. Key Features - 25mL capacity for routine laboratory solution preparation. - Class B accuracy with ±0.06mL tolerance. - Durable PYREX laboratory glass construction. - No. 9 standard taper ground glass stopper included. - Sharp permanent graduation line for consistent measurements. - Large white markings for easy identification. - Flat-bottom design for stable laboratory placement. - Long narrow neck for controlled filling to the calibration mark. - Economical alternative to Class A volumetric flasks. - Reusable construction for routine laboratory applications. - Suitable for educational, chemical, pharmaceutical and research laboratories. Specification Details Brand PYREX (Corning) Product Code 5641-25 Capacity 25mL Accuracy Class Class B Tolerance ±0.06mL Material PYREX Laboratory Glass Flask Type Economy Volumetric Flask Stopper Size No. 9 Stopper Type Standard Taper Ground Glass Flask Shape Flat Bottom Neck Style Long Narrow Neck Height Approximately 121mm Outer Diameter Approximately 40mm Graduation Permanent Single Calibration Line Reusable Yes Quantity per Pack 6 Flasks Quantity per Case 12 Flasks Replacement Stopper PYREX Series 7650 No. 9