Woodland Scenics Medium Green Underbrush Particle size is approximately 3mm - 7.9mm (1/8 in - 5/16 in) Coverage 353 cubic cm (21.6 cubic in) Models tree foliage for medium to large trees and low-to-medium ground covers, such as bushes, trees and shrubs. Use for any scale, colorfast and blends with other foliage About UnderBrush Models low-to-medium ground cover, such as bushes, trees and shrubs, and to make small to medium trees. Available in six colorfast colors that blend with other foliage. Use for any scale. Attach to Tree Armatures with Hob-e-Tac®. Attach to layout with Scenic Glue™. Purchase the Scenery Manual for additional information about how to use the Landscape System.