We are using correct manufacturing,for this reason; there is perfect heat insulating between out of bodies and inside of bodies. There is epoxy, aluminium trade plate or stainlesss sheet on the floor. There is profile skeleton inside of panels. Walls of bodies are panel. Panels has polyester sheet, besides; there is 40 density polyurethane foam between of polyester sheets. There is aluminium profiles upper of body and side down of body. The rear frame of body manufacturing from 304 quality stainless stell. There is stainless door locking systems on the doors.