Volumetric Flasks, Red Stained, Class A, Wide Mouths, Heavy Duty, PTFE Stoppers

Low actinic red stained glass provides protection to light sensitive solutions. Allowing less than 1% transmission below 400nm and 5% from 400-600nm. Wide mouth design facilitates mixing, pipette access, sampling and filling. Unique Flat Bottom Interior permits the use of a standard stir bar. Large permanent white letters make the capacity clearly visible. Flasks are calibrated "To Contain" at Class A tolerances, per ASTM E288 specifications. Supplied complete with a PTFE stopper. PLEASE NOTE: Volumetric Flask Capacities of 20mL, 500mL, 1,000mL, and 2,000mL are NOT included in the the ASTM E288 Specifications. However, flasks are calibrated to Class A tolerances.