ArmSupport Red Shoulder support takes work comfort to an entirely new level Sitting or standing, you'll be in the perfect position for more pain-free productivity ArmSupport Red makes a great productivity tool even better, helping to ensure proper work posture and alleviate muscle strain in your neck, back, arms and wrists while sitting or standing. Created specifically for RollerMouse Red and RollerMouse Red plus, ArmSupport Red aligns the upper body while you type and use your RollerMouse. Able to be clamped to the front edge of desks from 1" to 1-3/4" in thickness, this accessory to the RollerMouse Red is ideal for height-adjustable workstations.. ArmSupport Red provides the ultimate support for maintaining a neutral typing and mousing position in either a standing or sitting position.