ESI Ergonomic Solutions ESISOLUTION4 Combo Solution 4, With Mouse Forward Keyboard Platform, Sit-Stand Articulating Arm, Black Single Part Number for complete system Lift-and-Lock Arm mounts on 24.75" glide track. Extended reach arm provides 16" height adjustment (8" above to 8" below track.) Single one-piece 27.5" platform with mouse forward design can be reversed for left or right-handed users Detachable leatherette covered gel palm rests provided for each surface.