Create Instant Active Standing: VIVO’s corner desk riser provides on-demand standing throughout the day for the freedom to get out of your chair and relieve muscle tension,reduce stress,and increase productivity --Patented--Spacious 38" Surface: The large measuring 37.5” x 18” is ideal for corner desks and allows ample room for dual monitor/laptop setups and office supplies. The 37” x 12” keyboard tray raises in sync with the surface to create an ideal workspaceStrong Steel Frame: Durable steel frame resists scratches and provides sturdy support for your devices. The desktop holds up to 33 lbs,while the keyboard tray holds up to 4.4 lbsSmooth Lift Assist: A durable pneumatic spring and innovative simple touch height locking mechanism create fast and simple lift that lets you transition without breaking productivity or concentration (Adjustment Range: 4.3” to 20”)Very Minimal Assembly: This riser is almost ready to go right out of the box! Place on your existing desk,attach the keyboard tray,and start organizing your workstation.