What is a key characteristic of a serological pipet?

A serological pipet is specifically designed for the accurate measurement and transfer of liquid volumes in a laboratory setting. The presence of built-in scales marked along its length allows for precise measurements of milliliter volumes. This feature is essential for tasks that require accurate liquid handling, such as preparing solutions, dilutions, or in cell culture processes.

In contrast, while transferring larger volumes of liquid is indeed possible with other types of devices, a serological pipet is mainly characterized by its precision for smaller liquid volumes. The flexibility of the tip, which one might associate with other pipetting tools, is not a defining trait of serological pipets. Lastly, serological pipets are unsuitable for measuring solid materials, as they are specifically designed for liquids, highlighting the importance of their measuring capabilities.