The product is a set of 4 double track piers, each measuring 3.5" tall, designed for HO scale model railroads. These track piers are essential components for supporting and maintaining the double track layout in a model railroad setup. Made specifically for HO gauge trains, this set of track piers provides stability and realism to the track system, allowing for smooth and efficient operation of trains along the double track. Perfect for model train enthusiasts looking to enhance their layout with additional support for the track.