This HO scale Double Track Bridge is super detailed and will look great on your diorama, layout, or mantle. The model, as built from the plans, spans over 29 inches, is 6-1/4 inches at its highest point and 4-3/4 inches wide. The track center line spacing is 2 inches with over-head clearance well above 3-3/8 inches from a code 83 railhead. From railhead to bottom of shoe is approximately 15/16 inch. Parts are made from injection molded, impact grade styrene plastic. Central Valley Model Works no. 1900.