This is the Mahjong Key Cap: dot series. They are 1-9 dots that can be mounted on the numbers 1-9 of the keyboard.
(这是麻将键帽:筒牌系列,1-9筒可以安装在键盘的数字1-9上)
I have separated the colors in the 3mf file. If you download the stl file, you need to split it into parts in the slicing software and color it separately.
(我已经在3mf文件里分色,如果下载stl文件,需要你在切片软件里面拆分为零件,分别上色)