YoYoFactory's short-lived Catch 13 (aka C13) was a mini aluminum yo-yo that was based on YoYoFactory's Catch 22 model that had an aluminum body and titanium rims. The Catch 13 model had hub nubs that let you optionally attach a YoYoFactory-made hubstack as seen in this exhibit. This heavy-rimmed weight butterfly came with a size C ball bearing axle and 19mm response pads. Today, this yo-yo is challenging to find.
Of interest... To see all mini yo-yos in this museum, in the left panel, select Exhibits.
In the right pane, in the Name/Model field, type mini, then select Browse.