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Bifold Door Roller Replacement These rollers are suitable for bifold doors. They are made of stainless steel, and resist wear and breakage for long-term usage. They have a high capacity for load bearing to support the weight of your doors, and are simple to put in. This nylon roller guide for the top is designed to replace bi-fold doors panels up to 30 pounds. It can be used with aluminum profiles from System S1000. How do you identify a damaged bifold doo