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Bifold Door Roller Replacement These rollers are suitable for bifold doors. They are made of stainless steel, and they resist breaking and wear for a long time. They are sturdy enough to support your door's weight and are easy-to-install. This top nylon roller guide is designed to be used as a replacement for bi-fold door panels that weigh up 30 pounds. It is compatible with aluminum profiles from System S1000. How do you recognize the brok