ULTRA WIDE LONG ARM- with ultra wider and longer arm fits most monitors from 22''-35'' monitors with load capacity within 6.6~ 26.4 lbs (3-12KG), Perfect solution for deeper desktops VESA-COMPLIANT PATTERNS 75x75mm or 100x100mm, Supports C-clamp or Grommet hole installation, C clamp works great on desk thicknesses within 3.15” (80mm), while Grommet mounting fits desk thicknesses within 3.54” (90mm) WIDE RANGE ADJUSTMENTS Built-in with ultra-precision gas-strut, Support: +85° to -30° screen tilt adjustment, 360° rotation for landscape or portrait mode; Upright lift 13.5" (345mm) and +90° to -90° degrees swivel, Hold your monitors on a full motion to saves your valuable space INTEGRATED CABLE MANAGEMENT conceals inside, provide clean, neat and clutter-free appearance, maximum ergonomic comfort to relieve eye, neck, and back strain. USB HUB Built-in USB hubs in the base provide an easy way to charge your USB devices without using valuable desk space, note: Pls DON'T adjust the tension screw without the monitor on it, Adjust method: If the monitor keep rising up, Pls reduce the tension(to the direction of "-") On the contrary, Turn to "+"