Setrack sectional track is ideal for getting your railroad up and running quickly. Track features Code 100 nickel silver rail, attached rail joiners and molded-plastic ties with realistic wood grain detail. Standard curves are 22.5 degree sections of a circle and it takes 16 sections to make a complete circle. Double curves are 45 degree sections and require eight sections to make a complete circle. Packages include enough curved track to make a half-circle.