A manual height adjustment desk typically refers to a desk that can be adjusted to different heights manually, without the use of electronic controls or motors. These desks often have a lever or a crank mechanism that allows the user to raise or lower the desk's surface to their desired height.

The construction and design of a manual height-adjustable desk can vary. Some desks may feature a simple lever that locks or unlocks the height adjustment, allowing the user to lift or lower the desk surface. Others may have a crank handle that can be rotated to raise or lower the desk. The crank mechanism is usually connected to a set of gears or a lifting system that moves the desk up or down.