This 3-D model 24""W x 18""H depicts the substructures of all types of rock formations and incorporates hands-on activities as students match the rock specimens to the substructure, The graphic representation of the rock beds together with real rock samples make a great visual learning tool, Includes comprehensive Teacher s Guide which contains lab activities color overhead transparency blackline reproduction master and 20 rock and sediment specimens, Transparent model cover and marking pen also included, American Educational Products have a lead ship time of 21 days, SKU: AMED369