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Bifold Door Roller Replacement These rollers can be used for bifold doors. They are made of stainless steel, and are resistant to breaking and wear for long-term usage. These rollers are strong enough to support your door's weight and are easy-to-install. This top-quality nylon roller guide is made for replacement in bi-fold doors weighing up 30 pounds. It can be used with Aluminium System S1000 profiles. Ho