The Atlas HO Ready-To-Run-Rolling Stock 3-Bay Cylindrical Hopper Amerthene is a pre-built model train car made of plastic in 1:87 scale. It features a realistic design and is ready to be used on HO gauge model railroad layouts. This hopper car is perfect for collectors and hobbyists who enjoy adding detailed rolling stock to their train sets. The Atlas brand is known for producing high-quality model trains, making this item a great addition to any model railroad enthusiast's collection.