ERGOTRON SMALL CPU HOLDER - SYSTEM UNIT HOLDER ERGOTRON SMALL CPU HOLDER - SYSTEM UNIT HOLDER - BLACK. TechSpec Mounting Options: Mounting Options: Mounts to sturdy vertical surfaces. Where applicable, attach to wood stud. TechSpec Weight Capacity: Weight Capacity: 50 lbs (22.7). To increase support, a separately-ordered Wall Track accessory is recommended. Ergotron provides the total solution for any computer workstation. Complete your system with Ergotron accessories.