Kaloc (DS200-2) Dual Desk Monitor Arm - Fits 17" to 32" - Black Material : Aluminum Alloy Features: Internal Gas Spring (Adjust the pressure according to the weight of the display) - 3 Axis Freely adjust Rotation Tiling Angle adjustment: +35 degree to - 50 degree Hidden Cable Management Isntallation: 2 types A: Punch (Desktop hole diameter is recommended to be 20-60mm) B: Clamp (Thickness of desktop <95mm / The depth of Desktop >35mm) Height Adjustable: 132mm to 409mm Fit: 15-to-30-inch Screen Size