The Allen & Heath QU-SB-RK19 Rack Mount Kit is a precision-engineered accessory designed to securely integrate the QU-SB digital mixer into a standard 19-inch equipment rack or flight case, occupying 4 rack units (4U) of space. Constructed from durable steel with a sleek black finish, the kit includes two robust rack ears that attach directly to the sides of the mixer using the provided installation screws. Once affixed, the mixer can be mounted into any 4U rack case using the included rack screws with washers, ensuring a stable and professional setup. This rack mount kit not only facilitates a streamlined and organized installation but also enhances the portability and protection of the mixer during transport and use. Its design ensures that all rear panel connections remain easily accessible, making it an essential accessory for live sound engineers and studio professionals seeking a reliable and efficient rack-mounted solution for their QU-SB mixer.