HO/O-SCALE FLEXIBLE BLASTED ROCK SANDSTONE WALL - Multi-scale, preweathered, easy to cut and adhere! For use as retaining walls, tunnel liners or general rock details. Change pre-weathered tone to depict mild, wet or dry climates by removing pre-weathered paint with acetone then adhearing acrylic weathering paints. Adhere with hot glue. Each sheet measures approximately 11-1/2" long x 3-3/4" high x 1/4" thick.