This part is a replacement gasket for your dishwasher. The gasket creates a seal at the bottom of the dishwasher tub, so water does not leak out while the dishwasher is running. If you notice water leaking out onto the floor, you should inspect the gasket for damages and replace as necessary. The gasket is gray in color and is approximately 22 inches long. It is made of plastic and is sold individually. This is a genuine OEM part sourced directly from the manufacturer.