Compatibility: Fits LCD, LED flat screen TV and monitor up to 27". Support up to 15.4 lbs. Mounting Holes applicable 75 x 75mm or 100 x 100 mm. Two stage locking system is applicable to 3.3 c-clamp and 3.1 grommet base. Fully Adjustable: The gas spring stand can tilt +45°/-45°, swivel +90°/-90°, and rotate 360°Max height is up to 17.1", and max extension is up to 27.2".