Ergotron WorkFit Convert-to-Dual Kit from Single HD, WorkFit. Maximum weight (capacity): 12.7 kg, Maximum screen size compatibility: 558.8 mm (22 "), VESA mounting interfaces compatibility: 75 x 75, 100 x 100 mm. Rotation: 360 °. Package dimensions (WxDxH): 699 x 239 x 118 mm, Package weight: 3.2 kg