This part is the replacement sump housing or sump insert for your dishwasher. It is made of plastic and is approximately 7 inches by 5 inches. The sump housing is attached to the bottom of the dishwasher tub and collects water for the pump. If your dishwasher is leaking, you may need to replace the sump housing. Be sure to disconnect the dishwasher from the water and power source before you begin this repair. This part is sold individually and is an authentic OEM part sourced directly from the manufacturer.