$125.51, Special Price span.tt:hover span.middle{ /* different middle bg for stretch */ This website uses cookies so that we can provide you with the best user experience possible. color: #3f3f3f; The larger the radius, the more headroom you need. MODERN STEEL PANEL DOORS DESIGNER WINDOWS, MODERN STEEL PANEL DOORS CONTEMPORARY WINDOWS, MODERN STEEL PANEL DOORS TRADITIONAL WINDOWS, 12 Radius = 10 Required This kind of system is for doors with taller or larger top sections. The low headroom track, also called dual-track, has a second horizontal track.