This is an Atlas N Scale Pier Girder Set. FEATURES: Designed for use with N scale Atlas railroad layouts or dioramas. Pier Girders are used during construction of bridges, and for under and over railroad layout figures. Black plastic construction. INCLUDES: Four Pier Girders SPECS: N Scale Length: 5" (12.7cm) COMMENTS: Piers are not included (ATLU2543). Purchase the Pier Set for the figure 8 layout separately