The Athearn Trains In Miniature Blue Box 1840 Undercoated Std R.P.O. Kit is a model train accessory in the HO scale. This kit features a blue color scheme and is not a modified item. The Athearn Blue Box brand ensures quality and authenticity for collectors and hobbyists interested in model railroads and trains. Perfect for enhancing and customizing model train layouts, this kit offers a realistic and detailed addition to any miniature railroad scene.