Easily adjust your monitor with this economical, manually adjusted monitor arm. Simple linked extension arm extends in or out, tilt or rotate for your perfect height. Height adjustable along the length of the pole mounted base. Strong durable construction withstand the rigors of the busy office. Easy to install clamp fits desk up to 4 thick. VESA MIS-D compliant for monitors up to 15 lbs and 27 . Saves valuable desk space. Use with Alera Sit-Stand Lifting Workstations. Triple Monitors. Wall/Ceiling Mounts and Hardware Type: Desk Mount; Mounting: Clamp/Grommet; Desk; Depth: 4.75 ; Width: 18.5 to 56.88 .