Maerklin 80323 | Z Insider Annual Car for 2013 Prototype: 2-axle insulated boxcar. Privately owned car painted and lettered for Kühltransit AG, used on the DB. Model: The side walls of the car represent vertical board construction. The car has fixed refrigerated area doors. This is a new car type as an insulated boxcar. The car body has boards running the length of the car; the car body is made of plastic and is prototypically lettered. Length over the buffers approximately 40 mm / 1-9/16".