Aluminum Glass Door model 511 is designed in sizes up to 16'2" (4928 mm) wide and 16'1" high (4902 mm). Featuring a narrow center stile width of 21/32" (17 mm), 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.