Sanwa Direct Trackball Replacement Ball, 34mm, Glossy Finish, Universal Black, 400-MABALL34BK

This 34mm diameter replacement ball is compatible with trackball mice. You can cost-effectively replace the ball without replacing the mouse itself to improve control, or customize it with your favorite color for a different look. Compatible with 34mm trackball mice from other manufacturers, including ELECOM, Logitech, Kensington, and ProtoArc. Compatible models: Logitech MX ERGO/ERGO M575SP, ELECOM EX-G TRACKBALL, ProtoArc EM04, and Kensington Pro Fit Ergo TB450. Choose from four colors: red, blue, black, and violet. If you are using a different color ball, please refer to the replacement ball compatibility chart on the Sanwa Direct website, as ball colors may be mismatched with the sensor light color. (Note: Red pens often don't mix well with blue, so be careful with red and purple, and black and blue.) With a roundness of 50 μm and a surface roughness (Ra) of 0.3 μm, the highly precise spherical design ensures smooth operation, making work more comfortable. The three-layer structure of a glossy finish, aluminum particles, and an internal ball core enhances operation and durability.