This is an electromagnetic valve by Festo, part number 546706. It is a 5/3 vented valve in the middle position, with an Ingress Protection (IP) rating of 65. This valve is used for controlling several functions, such as air, water, or other fluids, and is operated by an electric signal. It is a switchable valve that can be open, closed, or in the middle/neutral position. The IP65 rating means that the valve is watertight and dustproof.