Woodland Scenics Concrete Wing Wall (3) HOThree HO Scale Concrete Retaining Walls for Your Model Railroad Layout from Woodland Scenics. Retaining walls are built where terrain cuts and fills are required. They prevent rocks and dirt from falling on railroad tracks or roads. They are made of a variety of materials. FEATURES These concrete retaining walls are cast in high-density Hydrocal. They can be used alone or installed adjacent to another in an endless chain to create straight or curved walls. They can be cut to varying heights to create stepped winged walls. These white casts are authentically detailed in appearance and texture. Create ultimate scenic realism simply and economically. Ready for staining or painting right from the box. Easy to follow instructions for installation of walls. INCLUDES Three HO Scale Concrete Retaining Walls REQUIREMENTS Adhere Wall(s) to Layout Lightweight Hydrocal, Flex Paste or White Glue Hobby Knife, Sandpaper or File Hacksaw or Coping Saw (Used for Shortening and Butting) Earth Color Liquid Pigments SPECIFICATIONS Scale: HO 1:87 Size: 2-11/16" x 5" -- each