A box which is expandable vertically and horizontally is disclosed. The box can be expanded both vertically and horizontally simultaneously, or in only one of these directions. This is accomplished by pulling/pushing opposite sides further/closer to each other. Rails which at least partially extend between respective opposite sides allow such an expansion/or contraction, the rails, in embodiments, having a pin of one section of the box held within a slot of an adjacent section of the box. The box, in embodiments, is made up of four separate pieces, each being one quadrant (top & left, top & right, bottom & left, bottom & right) of the box. Such a box can be expanded/collapsed to fit within a window and hold an air conditioner there-in.

An exemplary security enclosure for equipment has four substantially planar side panels with multiple engagement openings and is received on a surface. The panels have a generally square cross-section and have engagement protrusions along an edge that engage engagement openings in an adjacent panel or an interposed connector frame. A top panel is engaged across the upper end of the side panels using the same inter-fitting engagement protrusion and engagement opening pairing, which together with the surface, completely enclose the equipment. A tang is fixedly attached to one of the side panels and extends through the top panel. A puck lock receives engages an opening in the tang with a hasp that is completely enclosed within the lock, preventing relative motion of the panels. A surface mount include legs section extending downwardly from a side panel and present a downwardly oriented face, the face having an opening. A fastener dimensioned to slideably engage through the opening secure the security enclosure to the surface.

The reusable packaging box includes a bottom unit that has a receiving space in which a product may be received, a lower body and an upper body that are provided to each have a box shape with open top and bottom to be coupled to a top of the bottom unit, and a lid that has a receiving space in which the product may be received and is coupled to the top of the upper body. Each of the bottom unit, the upper body and the lower body, and the lid is formed of a material that may absorb an impact and thus may perform both a function of absorbing an impact and a function of packaging an outside of the product.