The tube rail chain extension kit is to be used in conjunction with the 5 piece rail system for the Chain Drive 550, when the door measures 8 ft in height. The extension kit rail replaces the end section of the 5 piece tube rail system. Installation is easy with no additional assembly hardware. Extension kit cannot be used on the Chain Drive 500.The tube rail chain extension kit is to be used in conjunction with the 5 piece rail system for the Chain Drive 550, when the door measures 8 ft in height. The extension kit rail replaces the end section of the 5 piece tube rail system. Installation is easy with no additional assembly hardware. Extension kit cannot be used on the Chain Drive 500. See More
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The tube rail chain extension kit is to be used in conjunction with the 5 piece rail system for the Chain Drive 550, when the door measures 8 ft in height. The extension kit rail replaces the end section of the 5 piece tube rail system. Installation is easy with no additional assembly hardware. Extension kit cannot be used on the Chain Drive 500.
