Konig & Meyer 18822W Omega Arm for 3rd Keyboard - White  

The 18822 is a handy stacker by Konig & Meyer. Konig & Meyer is a German company that produces high-quality stands. This stacker was designed to be used together with the 18800, the 18810, or the 18820. Furthermore, it’s important that you already have attached the 18811, as the 18822 will not fit without it. This stacker will give your stand a third layer, so you can add a third keyboard to your set-up. The depth and height of the stacker are adjustable, so you’ll always be able to properly see and use your other keyboards.