The 5G System with 550 Big Board by Humanscale is a well-designed keyboard sold by the top manufacturer of articulating keyboard systems. The 500 Big Board design allows a keyboard and mouse or another input device all on one surface. Select a mechanism and pick from a variety of options to suit particular needs or work with a unique workstation. This keyboard system comes equipped with Humanscale's 5G keyboard system which combines easy dial-a-tilt and height adjustability. The keyboard is equipped with a raised tilt mechanism to protect the keyboard from collisions with the desk. For this keyboard system, you have the option of specific track lengths that will fit virtually any work surface; 11 inches, 12 inches, 14 inches, 16 inches, 18 inches, 22 inches (standard), 25 inches, and 27 inches sizes are available. You can also customize the palm support with three options; 20-inch Foam with Synthetic leather cover, 20-inch Gel with Synthetic leather cover, and 20-inch slim palm support. These palm supports are available in a Gray or Black finish. Ships FREE in 5 business days.