Ergotech Freedom Arm for iMac 2007-2011 Models (FDM-MAC-S01) Includes desk clamp base + 8" pole Max desk thickness: 2.5" Warranty: 3 Years Monitor Weigh Capacity: Min 20lbs/Max 30.8lbs Tilt: up 90, down 45 Pan: 180, rotation: 360 Height adjustment: up to 14" Full extension range: 24"