Used in good condition, very sturdy and heavy. Working properly . Check pics for more.

The Heavy-Duty Dual Monitor Arm uses pneumatic gas cylinders to provide independent support of 2 monitors each weighing between 19.6lbs to 33lbs. Vertical height range of 12" Maximum height above the desk is 18" measured at the center of the monitor Recommended maximum monitor size is 28" Uses standard VESA mount Maxim