You are bidding on a 6 car set of HO scale, corrugated Santa Fe (ATSF) streamline passenger cars. The set includes a railway express car, 2 coaches, a vista some, a full length dome car and an observation. The full length dome is chrome plated and was made by Bachmann. I don't know who made the RPO but it has black trucks instead of silver. The other four cars are made by Athearn. One of the coaches is a little "weathered" and has a loose weight. The cars are used but in good running condition. They come equipped with NMRA couplers installed. Buyer pays shipping.