This 100% carbon fiber plate is designed to turn any standard one instrument Velocitek bracket into a two instrument bracket.
This plate is designed for either a Prism/ProStart or Prism/SpeedPuck combination.
Just install the plate in between your ProStart/SpeedPuck cradle and bracket using standard hardware, and install your Prism above (or below) on the other side of the plate.
Also works with Raymarine Micro Compass "Tacktick".