This is accessory for figures/dolls.
Adapted from the GoodSmile website:
A set of support arms that can be used with Harmonia bloom dolls!
Presenting a set of support arms that can be used with Good Smile Company's Harmonia bloom dolls. Three types of support arms are included for different uses. Using the included attachment part, the support arm can be attached to Harmonia bloom stands. Enjoy using them with your own Harmonia bloom dolls.