The Flex frame is a 3-stage that allows you to raise and lower your desk quickly and quietly between 25. 6” and 51. 4” at 1. 5” per second. Use the included Memory controller to preset your perfect Height for use throughout the day. The LED screen on the controller shows you the exact height of your desk as it raises and lowers. The flex also comes with leveling feet to keep your desk sturdy even on uneven surfaces. The top is made from high qualify MDF laminate and is scratch resistant, measuring 1” thick, 59” L x 29. 5” W. Easy to follow instructions makes it all that much easier to set up your desk within a half hour.