This is a model of an RhB two-axle transport car with a removable waste removal hopper. The paint scheme and lettering are prototypical for Era VI. The hopper is realistically weathered. The car has metal wheel sets. Length over the buffers 41 cm / 16-1/8".
Unit trains loaded with these hoppers are used to remove waste during construction of the new Albula tunnel. The ideal motive power for this is 28441.