Volumetric Flasks, 50ml Pack of 6
Volumetric flasks are used to make up and store precise volumes of a solution and have a single graduation line to indicate volume, calibrated to be accurate at 20 C. These flasks include a ground-glass stopper for air-tight storage.***Volumetric glassware is intended for storage of solutions and is made of high grade soda-lime glass.  This glass is especially resistant to attacks from acids and alkalies, but it should never be heated over a flame.  For heating use a laboratory grade borosilicate glass beaker of flask.***