Available in any height up to 12 feet, the TF System's vertical design mimics traditional concrete formwork and accommodates virtually any design, from curved to elliptical walls. This insulating concrete form (ICF) system consists of four components: expanded polystyrene panels (available up to 4 inches thick and 12 inches wide), premolded corner sets, I-beams, and a galvanized steel C-channel. TF System-The Vertical ICF Inc. 800-360-4634. www.tfsystem.com.