Ergotron LX - Mounting kit (sit-stand arm, extension, base, keyboard tray, slide-out mouse tray, wrist rest, mouse holder) - - 45354026

Effortlessly position a keyboard to the most comfortable typing position, while seated or standing. The LX provides a very stable platform for a keyboard and mouse - tested to be 3x more rigid than other keyboard arms! The tray's leveling mechanism allows the surface to be perfectly flat no matter where the keyboard is positioned.