In late 1916, the Denver & Rio Grande took delivery of 1,500 “Fowler clone” boxcars from Pullman-Standard. The design of these cars was directly inspired by a class of "Fowler" boxcars delivered to the Rock Island in 1915. They were 40’ long, single-sheathed and equipped with ‘Vulcan’ trucks. The Rio Grande assigned them road numbers 66000-67499 and operated them well into the 1950s. This is the "early" (pre-WWII) version of the car and is therefore equipped with a "K-brake." Like all Shapeways designs, this model requires cleaning, trucks, couplers, paint, stirrups and decals to complete. I recommend equipping it with standard Micro-Trains roller bearing trucks (to my eye the side frames of roller bearing trucks are the best available stand-in for Vulcan trucks). It is designed to navigate curves as tight as 9 3/4" radius when equipped with the recommended trucks.