Just a simple good quality dual monitor arm, in excellent condition. $80 brand new on Amazon. Comes with original box.

Features from Amazon page:

• VESA Compatible: The monitor arm is suitable for mounting most screens 17"-32" in size and 17.6 lbs in weight and is compatible with 75 x 75 mm and 100 x 100 mm VESA.

• Cable Management: Removable cable clamps keep the table top organized, providing a neat table top and stylish appearance for the most comfortable working environment.

• Sturdy & Stable Construction: Heavy duty C-Clamp or Grommet Mount installation methods ensure the stability of the display arm and prevent rattling and tilting.