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Bifold Door Roller Replacement Ideal for bifold doors These rollers are constructed of stainless steel and resist wear and breakage for long-term use. They are sturdy enough to support your doors' weight and are easy to put in. for the top is designed to replace bifold doors panels that weigh up to 30 pounds. It can be used with aluminum profiles from System S1000. How do you recognize a broken roller on a bifol