These tear drop open top trailers resemble the ones U-Haul used many years ago. This set is designed to print in Frosted Ultra Detail for a more detailed look. I also have them in SWF at less cost, but the detail is less, also.
All models arrive unpainted shipped direct from Shapeways. Most have to be cleaned prior to painting. You can get more information at my website:
Dave's Model Railway Stuff (www.davesmrs.com).