Electric:
The Schneider Electric ZB4BK1213 is a 22mm black push button switch that is part of the XAL range. It is made from a resilient plastic and is designed for use within both industrial and commercial applications. The switch is single pole, single throw with momentary action, meaning that it works to open and close a circuit for as long as it is held down and then returns to its "off" state when released. It is IP65 rated for protection against dust and water and the terminals are suitable for use on either a screw or a cage clamp connection.