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Bifold Door Roller Replacement These rollers are suitable for bifold doors. They are made from stainless steel, and are resistant to breakage and wear for long-term usage. These rollers are strong enough to withstand your doors' weight and are easy-to-install. This top-quality nylon roller guide is made to be used in bi-fold door panels weighing up 30 pounds. It is compatible with System S1000 aluminium profiles. How do you recognize a broken bifold door roller