Volumetric Flask, Class A, Wide Mouth, With PTFE Stopper, As Per USP Standards

Wide mouth design facilitates mixing, pipette access, sampling and filling. Unique flat bottom interior permits the use of a standard stir bar. The graduation line on the neck is sharp with permanent large colored encryption for easy to read. Flasks are calibrated 'To Contain' at Class A tolerances, per ASTM E288 specifications. Supplied with closed bottom PTFE stopper to fit in the ground neck.