For use with all O scale layouts, Easy snap-fit assembly, Pieces are molded in gray plastic that realistically resembles steel, Let your O scale train track run across this trestle bridge, Styled after authentic American prototype, No glue necessary, Pictorial assembly instructions, Scale: O 1:48, Length: 17-1/4"" (43, 8cm), Height: 6-1/4"" (16cm), SKU: SPWS1372