Clamp-style, gas-powered black monitor arm, adjustable up and down, and left and right. - Type: Monitor arm - Color: Black - Mounting type: Clamp - Adjustment: Up/down and left/right movement - Material: Metal - Pole length: Approximately 41.5cm (measured) - Arm length: Approximately 48cm (measured from the pole to the center of the monitor attachment point) I fixed it to a desk with a thickness of 25mm using the clamp, but it seems to be compatible with thicknesses up to about 8cm. The spring strength of the gas arm is adjustable. Please purchase only if you understand that this is a used item and agree to no claims and no returns.