The Lionel FasTrack O31 Curved Piece 6-12015 is a metal and plastic track form designed for O-36 scale model railroads. This three-rail system in gray color features an AC power type and analog control system, making it ideal for hobbyists and collectors. Manufactured in 2016, this piece adds a realistic touch to any O scale train layout with its curved design, perfect for creating a lifelike track system for miniature trains to follow.