Simulated brown wood ties Nickel silver rail 16 pieces make a circle 6 pieces of track. N Code 55 Track Pieces to Create A 21.25" Radius Full Curve. Features: Designed with precision and sophisticated technology. Prototypically-finer brown ties and nickel silver rail. These Code 55 track pieces have the same reliability and durability as the Atlas Code 80 track. Rails are smaller than Atlas' traditional N scale Code 80 track. It's the ulimate in performance, reliability and realism!