Cinders Fine Ballast Woodland ScenicsBallast is used to create a variety of rock materials for your layout or diorama. Available in various colors and fine, medium, course, or blended grades, you can be sure to find a ballast to meet your needs. Ballast track, create roads, driveways, parks, and landscaping, or model natural rock. Great for mines or rock piles, too. 21. 6 cu. in. (353 cu. cm) bag. Please reference the Woodland Scenics ballast scale reference chart to help decide what