The designers of the different storage units in “Relations” experimented with a variety of materials. The fronts come in real wood veneer, melamine, paint or glass. All are freely combinable. Whether storage unit (4-5 binder height), ad- on units (2-3 binder height) or credenza (2-3 binder height). The doors of these units run on two rails. The special sliding- door mechanism creates space for hanging folder systems and drawers.