|bridge is complete with worn box. Great piece for the operating layout, and or Xmas display. MPC extension bridge kit, produced by Lionel from 1976-87. Highly detailed arched plastic trestle bridge that must be assembled, however assembly is very simple. Kit includes the sheet-metal base, embossed plastic sides, two sides and two ends, which are plastic and snap together, and two rock piers. Measures 24" long and 5 1/2" high. For single track use.