Woodland Scenics Ballast Fine Buff for Model Railways and Dioramas. This 21.6 in³ bag of decorative model Fine Buff Ballast is ideal for use with Model Railways and diorama creations to add extra detail. Model terrain surface and soil. Add texture and color variation to scenery, and provide a smooth transition from low ground cover to medium and high ground cover. It realistically models crushed rock and stones, is colorfast, and is suitable for any scale. The pack contains 21.6 in³ (353 cm³). Packaging Dimensions: Length: 12cm, Height: 17cm, Width: 3cm. Suitable for ages 14+. Model making should always be done under supervision.