Cotytech Expandable Desk Mount Spring Arm Quick Release with Clamp Base (DM-C1SA3-C) Desk-mountable, available in clamp base and grommet base; Clamp table thickness: 0.79-Inch to 2.36-Inch (20-60mm); grommet table thickness: 0.79-Inch to 2.36-Inch (20-60mm), hole Diameter: 0.39-Inch to 1.97-Inch (10-50mm); Solid Aluminum die-cast construction Weight Capacity: Supports 4.4 - 19.8lbs (2 - 9kgs); Tilt: 105; Rotation: 360 (portrait or landscape); Swivel: Max 240; 7.87-Inch Height adjustment; Mounting Pattern: VESA compliant: 75x75 and 100x100; Maximum extension: 15.75-Inch (400mm) pole length: 11.8-Inch (300mm); Expandable to support two monitors with additional arms; 10.6-Inch Height adjustment Quick connect & quick release designs at 3 connecting points: base, spring arm and monitor end; Maximum adjustment rendered by tilting, swiveling, pivoting and dynamic height adjustment; Swift and easy movements and adjustments Neat and efficient cable management; clean look with minimal hardware visible from underside of work surface; Space saving with its compact design; Maximum productivity and supreme ergonomic comfort; Easy installation and dis-installation