A Flexible Hose is a component in a truck's engine that allows for the transfer of fluids or gases between two fixed points. It is made up of a flexible rubber or plastic tube, surrounded by braided steel wire to provide strength and durability. The hose is designed to be flexible so that it can bend and move without causing damage to the engine or other components. It is commonly used in areas where there may be vibration, movement, or where there are tight spaces that require flexibility. Flexible hoses can be found throughout the engine and are used for a variety of purposes such as oil lines, coolant lines, and air intake systems.