Inspired by a prototype Northumberland, Pennsylvania, this Through Truss Bridge is the first truly American 18 inch bridge offered by Atlas. The HO Through Truss Bridge features simple, snap-together construction and specially designed bridge track. With two different colors to choose from for both Code 83 and Code 100 layouts, this bridge is perfect for any modeler. Features: Rivet detail and Simple construction - little glue required! Kit includes 18 Inch Through Truss Bridge & track with bridge tie spacing. Code 100 HO Track. Bridge dimensions: 9 inches x 1 3/8 inches x 2 1/4 inches.