The Crown Air Control Assembly Black is the perfect replacement part for maintaining optimal air flow and ventilation in your Marquis spa. Designed to fit a wide range of Marquis E Series and Celebrity Series models, this air control assembly ensures efficient air mixing for improved water circulation. With its sleek black design, it blends seamlessly into the aesthetics of your spa while offering reliable functionality. This assembly is easy to install and will help enhance the overall performance and comfort of your spa experience.