Scale:HONickel silver track with gray roadbed; 5/card. Five pieces of track make up one-quarter (90 degrees) of a 66.5? diameter circle. In general, 33.25? Radius Curved Track is best used to make wide, sweeping railroad curves to accommodate longer locomotives and rolling stock, and permit mainline operation at higher speeds. It can be placed on the inside of 35.5? radius curved E-Z Track� for excellent double-track mainline realism, and it can also be used to quickly lay track on a behind-the-scenes helix.