Evergreen Scale Models is the world's largest producer of polystyrene plastic shapes, strips, and sheet materials in metric and inch sizes. You can build clean, accurate models using evergreen scale models products. Evergreen products are used by plastic modelers, architects and artists as well as manufactures in the medical device, automotive and lighting industries. building...can be combined with wood, metal, and other plastics.Nontoxic and impervious to many chemicals, including water.