VARIDESK &ndash; Height Adjustable Standing Desk &ndash; Stand Up Desk for Dual Monitors and Cubicles &ndash; Cube Plus 40 Designed to fit perfectly into most standard-sized cubes or modular spaces Air-lift piston for easy operation Height-adjustable to 11 different positions for ergonomic comfort. Remains sturdy and stable even when fully extended Easily lift up to 35 lbs. (15.8 kgs.) in 3 seconds, allowing you to stand up and sit down without breaking your concentration Comes fully assembled right out of the box - no assembly, installation, or tools required! Holds up to 35 lbs (15.8 kg) Comes pre-assembled and ready to use Sits on top of existing desk Sturdy and stable even when fully extended 40&#034; W x 21 1/2&#034; D x 4 1/2&#034; H (17 1/2&#034; when raised) Greenguard Greenguard Gold UL Certified to BIFMA Standards