Extension Arm Part ONLY | PopUp Series Monitor Arm designed for quick transition from sitting to standing in seconds. Engineered for better ergonomics to increase viewing comfort and help reduce eye, back and neck strain. | Sleek Silicon-Age Design complements your flat screen monitor and frees up desktop space. Cord management system hides cables, which means more usable workspace and a cleaner desk | Aircraft-grade Solid aluminum construction will withstand years of abuse. Securely mounts to your desk with premium clamp. | Expandable - Add a second screen, mount to a wall, add an extension arm whenever you need it. Look for PopUp Series for compatible parts.