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Bifold Door Roller Replacement Suitable for bifold doors They are constructed from stainless steel, and are resistant to break and wear for long-term use. They are sturdy enough to support your door's weight and are easy-to-install. This top-quality nylon roller guide was designed for replacement in bi-fold doors weighing up 30 pounds. It can be used with aluminum profiles of System S1000. How do you recognize the broken roller on a bifold door Bifold doors are a great storage solution for clo