Compatible with YU2, YU4, and other 3 to 4-inch speakers Heavy-duty steel construction and foam padding reduces vibration for crisp and clear nearfield listening Top plates can be rotated up to 30 degrees to change the angle of the speaker Each plate comes with a mounting hole and 1/4" - 20 screw for fastening the speaker in place Hollow support column enables efficient cord management and prevents cable clutter Dimensions: Width: 11cm; height: 21cm; depth: 18cm