The Model 511 door is designed in sizes up to 20'2" (6147 mm) wide and 16'1" high (4902 mm). Featuring a narrow center stile width of 5/8" (16mm), these doors are sleek, attractive and permit maximum visibility. An array of glazing choices, top and bottom rail widths, finishes and special options customizes the 511 to satisfy nearly any project requirement.