The Amphenol Industrial Circular Connectors - Accessories 10-101949-018 is a sealing gasket designed for use with #18 wall receptacles. This gasket is made of a durable rubber material and is designed to provide a tight seal between the receptacle and the wall. This gasket helps to prevent moisture, dust, and other contaminants from entering the receptacle and damaging the electrical components inside. It also helps to reduce noise and vibration from the receptacle. This gasket is easy to install and is suitable for a variety of industrial applications. It is also resistant to corrosion and can withstand extreme temperatures.