This SceneMaster(TM) kit makes it easy to to model sheet steel piling (SSP) retaining walls in HO scale. A must-have detail for modern waterfronts and construction sites, the kit includes add-on concrete walkways, bollards and dock cleats for harbor scenes. Molded in three colors, the kit includes two sets of pilings and concrete walkways to build up to 20-1/4" (51.4cm) of walls, and is easily expanded with additional kits (sold separately).