PYREX 50mL Lifetime Red Class A Volumetric Flask with No. 9 Glass Standard Taper Stopper

The PYREX 50mL Lifetime Red Class A Volumetric Flask with Glass Standard Taper Stopper is precision laboratory glassware designed for accurate solution preparation, dilution and volumetric measurements. Manufactured from durable borosilicate glass, it features a machine-blown body, reinforced long neck, permanent Lifetime Red calibration marking and No. 9 hollow glass stopper. Its Class A accuracy makes it suitable for analytical chemistry, pharmaceutical testing, quality control and laboratory research. Key Features - 50mL capacity for precise laboratory solution preparation. - Class A volumetric accuracy with ±0.05mL tolerance. - Durable borosilicate glass construction. - No. 9 standard taper hollow glass stopper included. - Lifetime Red calibration marking for excellent visibility and permanence. - Fine calibration line etched through a narrow red band into clear glass. - Permanent graduation marking eliminates the need for additional marking filler. - Machine-blown glass body for improved durability. - Reinforced heavy-tubing neck for increased strength. - Flat-bottom construction for stable laboratory placement. - Long narrow neck for controlled filling to the calibration mark. - Calibrated To Contain (TC) for accurate volumetric measurements. - Reusable for chemical, pharmaceutical, educational and research laboratories. Specification Details Brand PYREX (Corning) Product Code 5660-50 Product Series Lifetime Red Capacity 50mL Accuracy Class Class A Volumetric Tolerance ±0.05mL Material Borosilicate Glass Flask Type Precision Volumetric Flask Calibration Type To Contain (TC) Graduation Style Lifetime Red Etched Calibration Line Stopper Size No. 9 Stopper Type Glass Standard Taper Stopper Material PYREX Glass Stopper Design Hollow Glass Flask Shape Flat Bottom Neck Style Long Reinforced Neck Height Approximately 152mm Outer Diameter Approximately 51mm Applicable Standards ASTM E694, ASTM E542 and ASTM E288 Reusable Yes Quantity per Pack 6 Flasks Quantity per Case 12 Flasks Replacement Stopper PYREX Series 7650 No. 9 Flask and Stopper Supplied Yes