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Pipettes are laboratory instruments used to measure, transfer, and dispense precise amounts of liquid. They are essential tools in many scientific fields, including biology, chemistry, and medical laboratories, where accurate liquid handling is crucial. Pipettes come in various types, such as graduated pipettes, micropipettes, and volumetric pipettes, each designed for specific volume ranges and precision levels. Some pipettes are manual, operated by hand, while others are automated and require mechanical operation. They are commonly made from materials like glass, which is resistant to chemical corrosion, or durable plastics like polypropylene, which are often disposable. Pipettes are used in tasks such as reagent transfer, sample preparation, and titrations, where precise measurements are essential.