A conveyer Unloader for rail yards or depots where hopper cars can gravity unload to road tankers. This is based on a prototypte (see photo) and the conveyer should fit under most HO Hopper cars. I've made the wheels rotatable, as per the prototype and they could be set to different heights with a little adhesive (they are supplied on sprues and can be snipped off and fitted to the chassis). The discharge tube should fit over my bulk trailer models, but could be extended with a plastic, or paper-made tube. The model could be used in reverse, to unload a road trailer and load a rail hopper. Please note, the images are from my 3D CAD model and not the actual printed model. I'd be pleased to receive photos from any customer who has received their Conveyer model.