Color: Matte Black This is a 34mm bearing-type trackball case that can be used with the "Keyball" series. This is a premium bearing specification case ordered from FADOTECH, which can be purchased from the following URL: https://booth.pm/ja/items/6421025 I used it for about 2-3 days, but I decided to sell the Keyball itself, so I am putting this up for sale. It's in good condition because it was only used for a short period. Although not included in the photos, I will also ship the black screws for fixing it.