Large "Leipzig" fence letterbox The "Leipzig" fence letterbox stands out with its particularly large capacity. The material is steel, which has been galvanised for a long service life. It also has a protective coating. Items that do not exceed the DIN C4 format do not need to be folded, as the letterbox has the appropriate size with the rear insertion flap. In addition, this letterbox can be mounted on a door so that it can be used as a throw-through box. This is because the rear insertion flap can be removed quickly and easily.