Dell - 452-BDQI mounting kit

Precision Compact Dual VESA Sleeve Mount lets you to achieve a clean desk look by securely holding the system behind the monitor. This mount works with Single or Dual Arms, mounting the system between back of the monitor and the arm. It comes with a 4-sided sleeve (2 pieces to be assembled) to hold the system, VESA Mounting Adapter plate (attaches 4-sided sleeve to the monitor), and screws.