This is a display base or stand.
From the Good Smile Company website:
Displaying figures with a special display often makes a collection look more appealing, but at the same time preparing a special display case is a huge amount of effort. We heard the cries for an easier display option and created this Dioramansion series of display backgrounds! They are simple to use and can be used as a photography kit or simply as a complete display background!
There are various different ways to connect the plates together allowing you to easily create your own customized display space for your figures! These new additions to the Dioramansion series are 150mm x 150mm in size which works great with Nendoroid figures!
- [Material]: ABS (UV Inkjet Print)
- [Contents]: 3x Main Panels, 3x Clips A/B (With Runners)
- [Size]: Approx. 150mm x 150mm