Add realistic detail to railroad and highway rights-of-way in minutes with this easy to build Cornerstone Concrete Culverts kit. The prototypes divert and direct water away from overhead embankments, and have been in use for decades. Other features of the HO model include: Builds two each box- and pipe-style culverts Easily added to new or existing scenery Molded in gray plastic with concrete texture Kit includes Two each small and large style aprons Eight wing walls Two each box (square opening) and pipe (round opening) style head walls Parts to build four rectangular barrels used inside box-style culverts