ErgearSingle Monitor Mount Stand, Adjustable Gas Spring Monitor Arm Desk Mount, Swivel VESA Mount with C Clamp, Grommet Mounting For Most 17-27 Inch Flat Curved Computer Monitors, Hold up to 14.3lbs

ErGear Single Monitor Mount, Articulating Gas Spring Monitor Arm Desk Mount Stand with Clamp and Grommet Base, Fits 13 to 30 Inch LCD Computer Monitors

ErGear Dual Monitor Mount, Gas Spring Arm for 17"-32" Screens, Max 22 lbs Each, VESA 75/100mm, Adjustable Height, 180° Swivel, Tilt, 360° Rotation, Sturdy Steel for Office Use