Merck, CLS566050-12EA, Pyrex®Lifetime-Red™volumetric flask with Pyrex®stopper

Features and Benefits
Pyrex® Lifetime-Red™ volumetric flasks with Pyrex® stoppers (volume 50 mL) have the capacity mark etched as a fine line through a narrow red band into clear glass, making a filler unnecessary and giving high legibility, accuracy and permanence.
The strength of these flasks has been increased appreciably through machine-blown bodies to which are sealed heavy-tubing necks tooled for No. 9 Standard Taper glass stoppers.
These Class A volumetric flasks have been manufactured to Class A tolerances as established by ASTM E- 694 for volumetric ware, ASTM E-542 for calibration of volumetric ware and ASTM E-288 for volumetric flasks. Calibrated.

Legal Information
Corning is a registered trademark of Corning, Inc.
Lifetime-Red is a trademark of Corning, Inc.
PYREX is a registered trademark of Corning, Inc.