This is a Z-gauge (1:220) model of a British Railways Rectank wagon body, without bogies, wheels or the tool tray. If you aren't going to source those parts yourself, the complete model has also been uploaded, and there is also an upload of just the spares (but not the tool tray). Those models are under reviews and I hope they will be available for sale soon. Rectank_BR_28_Z_40_body_no_tray.stl