Characteristics and Interoperability For 17–30" computer monitors, the NB North Bayou Desk Mount Stand Full Motion Swivel Monitor Arm with Gas Spring (Within 4.4lbs to 19.8lbs) F80 Universal: Fits Most 17"–30" Monitors, with loads ranging from 4.4 to 19.8 pounds; VESA compliant, measuring 75 by 75 mm or 100 by 100 mm; the entire VESA plate measures 118 by 118 mm; if your VESA hole is inside a recession area, you may need to use an extra-long screw and screw spacer. Please take note that the VESA plate part can rotate 360 degrees (rotate it to the correct position as needed). COMPLETELY ADJUSTABLE: Your monitor can be easily positioned in any desired position thanks to the sturdy gas spring system; Customize your workstation to your liking; Your arm mount will remain stable thanks to the heavy-duty construction, excellent materials, and support for C-clamp or grommet installation.