cylinder is a geometric solid that is very common in everyday life. It has two ends, called bases, which are usually circular. Bases are always congruent and parallel to each other. Unlike a wheel, which rolls and may have a locking mechanism, a foot is a stationary weight-bearing implement on the base of a piece of restaurant equipment. It can be made of metal, plastic, or rubber and is usually bolted into the frame or base of the machine. A foot pedal refers to a foot-controlled actuator or valve, such as the one used to turn on a machine or a faucet. A valve is a device that regulates, directs, or controls the flow of fluid gases, steam, liquids, fluidized solids, or slurries by opening, closing, or partially obstructing various passages. In an open valve, fluid flows in one direction from a higher pressure to a lower pressure. Valves can be operated manually, either by a handle, lever, pedal, or wheel. Valves can also be automatic, driven by changes in pressure, temperature, or flow. These changes can act on a diaphragm or a piston, which in turn activates the valve. More complex control systems using valves that require automatic control based on an external input—that is, regulating flow through a pipe to a changing setpoint—require an actuator. These can be electromechanical actuators such as an electric motor or solenoid, pneumatic actuators that are controlled by air pressure, or hydraulic actuators that are controlled by the pressure of a liquid such as oil or water. An actuator will stroke the valve depending on its input and settings, allowing the valve to be precisely positioned and enabling control over a variety of requirements. Specifications: Height: 0.65 in. Width: 2.35 in. Length: 0.7 in.