A push-pull cable is a mechanical device used to transmit motion and force in various applications. It consists of a flexible inner cable that can be pushed or pulled through a protective outer casing. This design allows for efficient movement in systems where space is limited, such as in vehicles or machinery. These cables are commonly found in applications like automotive throttle controls, aircraft control systems, and industrial machinery. They provide a reliable way to control components without the need for complex linkages or mechanisms, making them a popular choice in many engineering fields.