A miniature set of scaffolding structure. It's mainly adapted from a commercial product.
Dimensions of a singular set in default size are about 82 x 97 x 58.4 mm (roughly in 1:2x scale). It could be extended in vertical and horizontal directions.
It might also serve as a plant support but I haven't test such purpose for a meaningful time span.
The author marked this model as their own original creation.