Graduated cylidners in a laboratory
A graduated cylinder is a measuring device used in laboratories all over the world. They are cylindrical tubes normally made of polypropylene which has a very high resistance to even harsh chemicals and have a hexagon base. On the sides are measurement markings usually in various increments in milliliters(mL). Most popular are the 4 Liter, 2 Liter, 1 Liter, 500mL, 250mL, and 100mL sizes.