Build busy mainlines, sidings and yards all along your layout with this line of ready-to-use track and accessories. Available in two popular sizes, Code 100 simulates heavy (155+ pounds) mainline trackage, while Code 70 can be used for medium rail (100 pounds) found on branchlines and sidings. The two can be combined for a more realistic variety of rail sizes, or used with other brands of track. All items come fully assembled, ready to install with nickel-silver rail and dark brown plastic ties, unless noted.