With Kato′s HO Scale Unitrack Modular Roadbed Track System, you can have an operating layout in minutes. Whether you′re a beginner or expert, Unitrack offers hours of enjoyment and trouble-free operation. Suitable for all types of layouts, whether temporary or permanent. This modular track system features an integrally molded roadbed for realistic appearance. Uni-Joiners (included) lock the track sections together for easy assembly and solid electrical connections. NOW WITH NICKEL-SILVER CODE 83 RAIL Dimension shown is length per piece. 16 sections are needed to make a complete circle of track.