Flasks, Volumetric, Class A, Red Stained, Flat Bottoms

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 glass stopper.   PLEASE NOTE:  VOLUMETRIC FLASK CAPACITIES OF 20mL, 500mL, 1000mL, and 2L SHOWN IN BOLD ARE NOT INCLUDED IN THE ASTM E288 SPECIFICATIONS.  HOWEVER, FLASKS ARE CALIBRATED TO CLASS A TOLERANCES