These stairs have a very open frame and are easy to use with a variety of base sizes. There are connectors at the top and bottom of the stairs so that is can bridge the gap between hubs.
These models come unassembled and unpainted. Normal hobby tools and superglue or white glue are required for assembly. For best results we recommend coating with Rust-Oleum brand professional enamel flat black paint as a primer before painting with other products.