This is a set of six flattop 1/87th HO scale sleepers, (I also offer a set with a back window) The six pack includes two of each, 36", 48" and 60". It has passed the software checks for Frosted Ultra Detail, as well as extreme detail. The higher the detail, the less the prep work. Should there be a problem, contact me either via this link on Shapeways, or via email to modelmechanic@gmail.com