This item is a fixed-pose model of a science-fiction/anime item.
Assembly Guide
Here's an excellent Rider Mask Display entry: a scaled-down prepainted PVC replica of Kamen Rider Agito Ground Form's mask, attached to a custom display base! The mask features clear red eyes, with enough room inside to attach your own custom LEDs to light up the eyes if you like. About 14cm tall before his horns are attached; after you attach the horns, the mask will be ready for display!