This 2" Foam Sheet is from Woodland Scenics" SubTerrain System. It"s the 4th Step (Out of 5) in Creating the Ideal Base for Realistic Scenery. FEATURES: Lightweight, white styrofoam sheet. Cut to enclose tunnels. Create interior terrain profiles. Use foam sheets to create elevated flat areas for towns and contour supports. Nontoxic. Easy to cut and shape to your modeling needs. INCLUDES: One 2" Foam Sheet SPECS: Sheet Size: 12" x 24" Thickness: 2" (5mm) COMMENTS: Subterrain manual and video are recommended for creating Subterrain Environments the Woodland Scenics way. Use of a Hot Wire Foam Cutter makes cutting quicker and easier. kr1/29/01 ir/jl