In a price sensitive environment, this economy keyboard system fits the bill! When you need a tray for the keyboard only, the Alpha Centauri arm features a compact size with a proven manufacturing process. The mechanism has a glide track of 17-3/4” with spring-assisted height and tilt that is conveniently controlled by a single knob. Height adjustment of 5.5”, and the tray tilts +/- 15 degrees. Tray is constructed from solid MDF covered in 3 dimensional laminate vinyl sealed over the surface. The tray includes a molded foam wrist pad covered in poly-suede fabric.