Expand Your Workspace: Enhance your ergonomic workspace by adding a second Ergotron LX Sit-Stand Arm to your desk-mount base using the Ergotron LX Sit-Stand Collar Kit; enjoy the flexibility of a dual-arm setup for increased productivity and multitasking capabilities Customizable Arm Placement: The collar allows you to attach a second Ergotron LX Sit-Stand Arm at any point along the pole, giving you the freedom to position your arms at the ideal height for your comfort and convenience; achieve a personalized and ergonomic workstation Premium Material: Crafted from polished aluminum, this collar kit adds functionality and brings a touch of modern style to your desk setup; the high-quality material ensures durability and a sleek appearance Effortless Installation: Simple installation process allows you to quickly and securely attach a second Ergotron LX Sit-Stand Arm to the desk-mount base, saving you time and effort Built to Last: Extensive quality testing ensures your monitor setup stays stable and secure; sets the standard for quality with a 10-year warranty and expert technical support