Class A Volumetric Flasks with PTFE Stoppers

Photo of Corning 5644 PYREX® Class A Volumetric Flask with PTFE Stopper

These Class A PYREX® volumetric flasks have machine-blown bodies to which are sealed heavy-beaded, heavy-tubing necks, tooled for PTFE color-coded keyhole stoppers. For replacement stoppers see Corning No. 7630. The graduation line is sharp and permanent. Large white block letters make the inscription easy to read. 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.

Photo of Kimble 28014F KIMAX Class A Volumetric Flasks with Color-Coded PTFE Stopper

Kimble 28014F KIMAX Class A Volumetric Flasks with Color-Coded PTFE Stopper has a graduation ring blasted on the neck. Calibrated to contain. With a marking spot on 10 mL and larger sizes. Supplied with a PTFE  stopper having a color-coded handle. Designed from ASTM Specification E288, Class A unserialized requirements. Replacement stopper is 41901R.

(Sample Photo Displayed. Individual items may differ from the image shown)