Safco Products 2143BL Premier Series Keyboard Platform with Control Zone, Black Premier under desk keyboard and mouse platform Ultra-thin 1/4" Phenolic keyboard platform 21"W x 111/2"D x 1/4"H Comfort zone height and tilt indicators allow consistent, customized positioning Leverless lift and release mechanism with 6" height adjustment range Tilt knob adjusts +10 degrees to -15 degrees