This is an HO Scale Code 83 Plate Girder Bridge from Atlas Model Railroad Co. FEATURES: Designed for use with HO scale Atlas railroad layouts or dioramas. Flat black plastic bridge with sides. Bridge track is already installed in the center of the bridge (all that has to be done is to connect the bridge to HO scale tracks). INCLUDES: One HO Scale Code 83 Plate Girder Bridge. SPECS: Scale: HO (1/87) Length: 9" (22.9cm) Width: 2-1/2" (6.4cm) Height: 1" (2.5cm)