Fellowes Professional Series Depth Adjustable Dual Monitor Arm (8041701) Two fully adjustable monitor arms for optimum viewing control Easy to mount-clamp attaches to desktops 1-3 thick or through grommet holes at least 3-1/4 in diameter Elevates LCD monitors from 3-1/2  16-1/2 above the desk with a reach of 2-1/2  27 Tilts up or down +/- 37 and freely swings left or right (360 rotation capability) Each arm holds a monitor up to 24 lbs and meets VESA mounting standards