Large Keyboard Tray up to 4.25" of Space, for Piano, Synthesizer, or MIDI up to 25lbsAdd to Any desk order or purchase separately. Any Size Large Keyboard Tray up to 4. 25" of Space, for Piano, Synthesizer, or MIDI up to 25lbs. Sliding Keyboard Tray Choose dimensions from drop down menu. 11" deep 3 4" thick Finished with a heavy duty polyurethane. The height is adjustable from 2" 4. 25" of space between desk and tray. Ball bearing glides for use up to 25lbs. The listed dimensions are for the actual tray portion. So, you will need an