This is a display base or stand.
From the Good Smile Company website:
These special optional panels are designed to connect to the Dioramansion 150 Racing Miku 2017 Pit series for more display opportunities than before! The illustrations of each panel were each done by popular illustrator Tony to cheer the team on for the last three races of the season together with a special series champion panel.
The panels make a great display background when put together with the Dioramansion set, and an acrylic stand is also included to put just the illustration on display as well - plus it also makes for a great item to get signatures on during pit lane walks! A set of Dioramansion clips is also included allowing you to connect the panels in various different ways - make your very own custom display space or storage space!
- Material: ABS (UV Inkjet Print), PMMA.
- Contents: 1x Main Panel + 1x Acrylic Stand. 6x Clip A, 4x Clip B
- Size: Approx. 150mm x 150mm