A volumetric flask is a lab glass or plasticware used to prepare a solution. It is used to make up a solution to a known volume. Volumetric flasks are used to measure volumes much more precisely than beakers or Erlenmeyer flasks. This 500 ml volumetric flask is made of borosilicate glass which makes it heat resistant and comes with a polyethylene stopper. This high-quality 500 ml volumetric flask has an accuracy of 0.25ml (0.25cc).