ErgoDuke Height Adjustable Sit Stand Desk Riser (Black) Ensure you remain comfortable while you work for long hours with the ErgoDuke Height Adjustable Desk Stand (Black)! Featuring a gas spring, this stand is height adjustable so you can alternate between sitting and standing as you work throughout the day. An economical and portable solution, this stand sits atop your desk without the need to completely replace your furniture! Available in White or Black.