Quad Monitor Stand Freestanding Base - Height Adjustable Arms for 4 Computer Screens, Fits 17, 19, 20, 22, 23, 24, 27 Inch, Fits VESA 75 100, Black COMPATIBILITY - Quad Monitor Stand for 27, 24, 23, 22, 21, 20, 19 inch and smaller computer screen sizes. FULL MOTION - VESA heads are capable of rotating your monitors from portrait to landscape. Swivel left or right 15 degrees, tilt up or down 45 degrees. HEIGHT ADJUSTABLE - Raise or lower each pair of monitors up or down the pole for ergonomic viewing options. CURVED ARMS - Curved and height adjustable horizontal rail for improved viewing position. HEAVY-DUTY - Made from steel and aluminum components with 70 lb weight capacity. Large free standing base removes the need for drilling holes on your desk.