Middle Atlantic QFP-1 3-Space Fan Panel, Textured or Anodized Finish 61-Key MIDI Controllers The 20-foot length is ideal

The 20-foot length is ideal for longer runs

You need to find this information in the pedal users manual or on the pedal in terms of a sticker

If you are not sure of which size to get

not even the keybed which had to be custom designed to achieve the effect of the control panel floating in to the white keys

Middle Atlantic QFP-1 3-Space Fan Panel, Textured or Anodized Finish 61-Key MIDI Controllers The 20-foot length is idealQFP 1 Number of Fans Installed: 1 Fan, Color Finish: Black Brushed Features: These quiet fan panel assemblies provide quiet cooling for demanding environment. Includes cord and plug. Select from black textured powder coat or black anodized finish. Product Type: Fans. Generic Specifications: One Fan: