Compatibility: Single monitor arm fit most flat or curved LCD/LED screen from 17 to 32 in, support up to 19.8lbs with 75x75mm, 100x100mm mounting holes. 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. Arm can swivel +180°/-180°. Monitor can tilt +75°/-45°, swivel +90°/-90°, and rotate +180°/-180°