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High quality aluminum Multi Folding Door System for Exterior and Interior applications. Suitable for Residential, Commercial and Industrial use. Life Time Warranty on Rollers and Hinges. 20 year Limited Warranty on Glass. 10 year Limited Warranty on all Frames. Low U factor models available.  Low E Dual Pane Tempered Glass. Numerous fold options. Can fold to the interior or exterior. We make any size you need in increments of 1/4”. Max height of 23 ft! Yes, 23 ft. Numerous fold options available, fold to the inside or outside, and a wide range of colors and sizes. Standard sizes are listed here, but any custom sizes are available upon request, as are any custom colors. For pricing on ANY CUSTOM SIZES up to 23 ft high send us a message on our CONTACT page and we will normally price it for you by the Next Day. Includes all Jamb materials, Thresholds, and Hardware. Dual Pane Tempered Low E Glass Included. All weather seals are storm proof, sealing all outer edges and between all doors with a patented interlocking double seal on the inside of the door and the outside of the door. Meets Title 24 energy requirements per CEC Tables 110-6A and 6B, performance compliance.