Mouse Ball Trackball for Logitech Cordless Optical Trackman T-RB22 Mouse Repair Part Replacement Features: 1. It is used one, but can work in good condition 2. It can replace your scratched, broken, non-working mouse ball 3. It is a good fit for Logitech Cordless Optical Trackman T-RB22 Mouse Specifications: Item name: Mouse ball trackball Color: Red Diameter: 4.3 cm/ 1.69’’ Condition: Used Quantity: 1PC Suitable for: Logitech Cordless Optical Trackman T-RB22 Mouse Packing includes: 1 x Trackball (PC) Notes: Trackball only, Logitech mouse in the picture is NOT INCLUDED Due to the different light, the angle and the display, the images may not reflect the actual color of the project Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.