Thank you for viewing! Please let me know your desired angle (40°, 50°, or 60°) via the transaction message after purchase. We also have 30° available on another page. Please refrain from price negotiations. Thank you for your understanding. --- This is an angle adjustment stand specifically for the Logicool MX ERGO and MX ERGO S. It uses magnets, metal plates, and protrusions to attach to the MX ERGO body by sandwiching it between the stand and the plate. It allows for work at a more natural hand angle by tilting the device further than the standard 20° inclination. * A stick is included for removing the ball, and it can be stored securely with a magnet when not in use. * It has a smooth and simple design that matches the shape of the MX ERGO. * The stand will not fall off even when the trackball is lifted. * 40° is popular, followed by 50° and then 60°. As the angle increases, the height of the ball also increases, so you may need to adjust the height of your hand with a cushion or similar. Made in Japan Color: Black Materials: Plant-based resin (bioplastic PLA), iron, magnet \* Please note that the surface may have layering irregularities or stringing due to 3D printing. \* Only the angle adjustment stand is included; the MX ERGO body and metal plate are not included. Type: Mouse