The NEW OEM Whirlpool Dishwasher Vent Assembly W11414073 W11038720 D42 is a replacement part specifically designed for under-counter electric dishwashers, such as the Whirlpool model MDB9959SKZ0. Made of durable gray plastic, this vent set includes everything needed for easy installation in your dishwasher. With the trusted Whirlpool brand behind it, you can be confident in the quality and compatibility of this essential appliance part.