This set of 2 bottom frames is perfect for Lionel O gauge Aluminum passenger cars. The frames are made of high-quality diecast material and come in a sleek black color. These frames are designed to fit perfectly with your existing Lionel train set, and are compatible with a DC power type. The frames are a replica of the 1960 model and are built to a 1:48 scale, making them a great addition to any transportation-themed collection. The analog control system allows for easy operation and the 2-Rail-2-Conductor rail system ensures smooth, reliable performance. The frames are corporate roadname branded with the Pennsylvania Railroad and are non-modified, making them a great choice for collectors.