Units can be stacked up to four high when mounted on a Base or used as single or two high freestanding unit without a Base - there's also a Wall Mounting Kit that that can be used instead of a Base.

Body units can be assembled in any order & rotated to face in any direction - Nest can be connected onto a Body unit when stacked or Feet added to make it a stand alone unit. 

A Lid is available to finish off the top of a Body compartment when used without a Nest.