AdaptivErgo Two-Tier Sit-Stand Lifting Workstation, 35.12" x 31.1" x 5.91" to 19.69", BlackPlatform's rear-notched design accommodates most monitor arms. Neatly route cables behind display.Designed specifically for use with the Alera AdaptivErgo™ Monitor Arms.Smart space-saving design stays within your desk space and raises vertically within the same plane; no having to step back and out when in the raised position. WARNING: This product can expose you to Lead, which is known to the State of California to cause Cancer and Birth Defect/Reproductive Harm. For more information go to www.P65Warnings.ca.gov. - Cancer:Lead;;Birth Defect/Reproductive Harm:Lead