Compatibility: Fits monitors from 17 to 32, and supports up to 19.8lbs. Mounting Holes detachable 75x75mm or 100x100mm. The two-stage locking system is applicable to 0.4-3.3 thick desk for both C-clamp and Grommet Base. Fully Adjustable: The high-grade steel gas spring arm can be extended and retracted to your ergonomic position. Monitor head can tilt +75°/-45°, swivel +90°/-90°, and rotate +180°/-180°. Double Benefits: Double efficiency and productivity to make working or relaxing that much more comfortable. Open up available desk space can help to provide a new range of adaptable positions for your displays. Dynamic: Height adjustable to raise monitors to eye level, allowing you to work in a more comfortable, ergonomically correct position to reduce neck and eye strain. Package includes: 1 x WALI Dual Monitor Gas Spring Mount (Black), Mounting Hardware Kit, User Manual, experienced and friendly US based customer support available to assist 7 days