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Bifold Door Roller Replacement These rollers are ideal for bifold doors. They are made from stainless steel, and resist breakage and wear for a long time. They are sturdy enough to support your doors' weight and are easy-to-install. This top nylon roller guide is designed to be used as a replacement for bi-fold doors weighing up 30 pounds. It is compatible with aluminum profiles from System S1000. How to identify the broken bifold door roller Bifold doors are an excellent solution to save