The 18" Bookcase is equipped with Three Adjustable Shelves and Five Plastic Floor Glides. All shelves adjust on 2" Centers and have 5 Contact Points for support. The body of the bookcase is electrically welded for extra strength. Set up, ready for the shelves to be put in place. WFX Utility™ Cabinets conform to ANSI/BIFMA. Made in the USA.