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Bifold Door Roller Replacement These rollers can be used for bifold doors. They are made of stainless steel, and they resist breaking and wear for long-term usage. These rollers are strong enough to withstand your doors' weight and are easy to install. This nylon roller guide for the top was designed to replace bi-fold doors panels that weigh up to 30 pounds. It is compatible with aluminum profiles from System S1000. How to identify broken rollers on the bifold d