The product is a set of two black plastic replacement steam box covers designed for Rivarossi 1:87 HO scale Mallet steam locomotives. These covers are compatible with HO gauge model trains and are specifically made for the HO scale Mallet model. The covers come unpainted, allowing for customization to match the desired aesthetic of the locomotive. Made in the United States, this product is a suitable accessory for model railroading enthusiasts looking to enhance the detail and accuracy of their HO scale Mallet steam locomotives.