Space efficient 42" surface. Top surface measures 42" x 15.7", which provides plenty of room for dual monitors. The 42" x 11.8" (10.2" in center) keyboard tray raises in sync with the top surface to create a comfortable workstation. Strong 33 lbs. lift assist - go from sitting to standing in one smooth motion using the innovative simple touch height locking mechanism (adjustment range: 4.5" to 20"). Lift design elevates straight upwards. NEW, out of box and assembled.