Functionals Ossa storage module The Functionals Ossa storage module is designed with the idea that everyone can use extra storage. Whether you're at home or at work. The Functionals Ossa modules can be stacked without using screws. The modular system is very strong, made of powder coated steel. You can place the cabinet against the wall or in the middle of a room as a room divider. The Ossa is a very flexible design by design duo Geckeler Michels. Both front and rear are just as nicely finished and available in three colors.