Konig & Meyer 18813-016-55 Stacker for Omega Adjustable Keyboard Stand Overview:

The black K&M 18813 Stacker is a second-tier add-on for the 18810 table-style keyboard stand. It features height- and tilt-adjustable support arms, which enable you to optimize your playing position. The lower extension arms support heavier keyboards while the upper arms are designed to hold lighter keyboards, MIDI controllers, or a laptop.

• Extension to the Omega 18810 keyboard table for a second keyboard, a laptop, or a MIDI controller
  
• Large lower support arms can hold the largest of keyboards
  
• Convenient height adjustment by spring-loaded locking knob (10.3 to 14.7")
  Can be tilted in 5 different positions from 0° (horizontal) to 20° to provide an unobstructed view of lower keyboard
  
• 4-way adjustable depth
  
• Slip-proof pads prevent scratches or slipping of instruments

Specifications:

• Construction: Steel
  
• Finish: Black
  
• Support Depth: 13" / 33 cm (4-way adjustable)
  
• Instrument Support: Non-marring slip-proof pads
  
• Load Capacity: 55.0 lb / 24.9 kg
  
• Tilt: 5 x positions from 0 to 20°
  
• Height: 10.31 to 14.76" / 26.2 to 37.5 cm (adjustable)
  
• Height Adjustment: Spring-loaded clamping knob
  
• Weight: 8.59 lb / 3.89 kg