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 CG-3020-A PTFE stopper.
PLEASE NOTE: VOLUMETRIC FLASK CAPACITIES OF 20mL, 500mL, 1000mL, and 2000mL ARE NOT INCLUDED IN THE ASTM E288 SPECIFICATIONS. HOWEVER, FLASKS ARE CALIBRATED TO CLASS A TOLERANCES.