Our steel garage door Model 181 features a long panel design with an embossed wood grain texture to enhance the appearance and durability of your door. The polystyrene insulation provides a 7.4 R-value for enhanced thermal efficiency of your garage space. A vinyl interior backing of the door provides a finished appearance. Model 181 steel garage doors come with a 20-year limited warranty which means they are built to last. A wide variety of window options are also available for these steel garage doors.