Compatibility: Fits Monitors up to 49" and 44 lbs. The two-stage locking system is compatibility for 0.47"~2" thick desk for both C-clamp and Grommet Base. Adjust: easily with quick detach Mounting plate and hide messy wires with built-in cable management. Sturdy Construction: The high-grade material gas spring arm can be extended and retracted, +50°/-20° tilt and +90°/-90° swivel to change reading angles, and 180° rotate from landscape to portrait mode. Double Benefits: Double efficiency and productivity by opening up desk space allowing a new range of adaptable positions for your displays, ergonomically correct position to reduce neck and eye strain. Package includes: 1 x WALI Gas Spring Single Monitor Desk Mount (Black), Mounting Hardware Kit, User Manual, experienced and friendly US based customer support available to assist 7 days a week.