Ergotech Freedom Arm, Single Aluminum Monitor Arm, holds up to 27" Monitor with Desk Clamp - Metal Gray Compatible with PC & iMac monitors with built-in VESA compatibility Please visit Ergotech website for complete list of compatible iMac models Includes articulating arm + desk clamp base + 8" pole Monitor Weight Capacity: Min 8.4lbs/Max 17.8lbs VESA Compatible: 75x75 & 100x100 Max desk thickness: 2.5" Warranty: 3 Years Tilt: up 90, down 45 Pan: 180, rotation: 360 Height adjustment: up to 14" Full extension range: 24"