ASTM Class A Borosilicate Glass Volumetric Flask with Glass Stopper, Blue Graduations Capacity:250mL and everyday warm-beverage service

and everyday warm-beverage service

Amino acid chromatography kit separates protein building blocks using paper chromatography techniques with 500g chemical supply for comprehensive analysis experiments

charging battery with motor-generator #1

3 glass steam trap at 7

and prism holder with a 25 x 25mm glass prism on a metal base

ASTM Class A Borosilicate Glass Volumetric Flask with Glass Stopper, Blue Graduations Capacity:250mL and everyday warm-beverage serviceSingle blue graduation mark on a Class A borosilicate glass volumetric flask with a solid glass No. 9 stopper, compliant with ASTM E288 for analytical solution preparation.