The Active Aqua humidity dome fits perfectly over the 2x4 Active Aqua flood table. It features 3-way ventilation for superior temperature and humidity control with vents on the top and on the side. These tall (8 1/2" high), sturdy domes accommodate larger plants for increased growing volume. This product is an exact fit with our standard white HGFT24 and standard black HGFT24. Does not fit premium flood tables.