The serological pipette is a laboratory instrument that transfers liquids measured in volume by ml. Most have graduations on the side for measuring the liquid being dispensed or
aspirated. An important step when culturing or plating cells is the even distribution throughout a solution.
Plastic pipettes such as polystrene are basically disposable, so there is no cleaning time involved ans pre-sterelized items are convenient in preventing contamination. Pipette are generally used for moving small amounts of liquid or when measuring and dispensing liquid in mL units.