Attachment for the 3rd level of the keyboard stands »Omega-E« 18800, »Omega« 18810 and »Omega Pro« 18820. The attachment can be easily and quickly positioned to the desired height using a locking and clamping button. In addition, the depth and inclination can be adjusted in various positions. This attachment can only be used in conjunction with the 18811 attachment. A rubberized stop ensures the necessary safety and prevents the keyboard from slipping.