Use this unique material to model all types of terrain. The strong, pliable sheet can be shaped and reshaped to create any level of detail and it holds its form without any understructure. This material is formulated to mechanically bond with the plaster to create a thin, hard shell ready for landscaping. Ideal for layouts, backdrops, dioramas, displays and arts & crafts. 1 Roll/pkg 18" w x 72" About Complete Terrain System The Terrain System includes all the products you need to model realistic terrain. These products all work together to make it easy to build any type of terrain for your layouts, displays and other projects. WARNING: CHOKING HAZARD - SMALL PARTS! NOT INTENDED FOR CHILDREN UNDER 3.