HomeConcept DE122BK Sit-Stand Monitor Extended Dual Air-Assist Arms, Black Easy lift with just a touch: smooth operation provided from premium hydraulic arm with durable gas spring inside means you don't have to pick up your monitor to adjust it. No more pain: support two monitors with our arms engineered for the best ergonomics to increase viewing comfort and reduce eye, back and neck strain Sleek silicon age design: complement your flat screen monitor and free up desktop space. Cord management system hides cables, which means more usable workspace and a cleaner desk Sturdy and strong: fully support monitor sizes from 15 inch -27 inch and weights from 6.4-17 lbs. Includes 75mm and 100mm vesa mounting patterns. Omnidirectional flexibility: position your screens exactly where you need them. Mount tilt (up/down/left/right): 180 degrees/mount swivel (around mount)