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Bifold Door Roller Replacement These rollers are suitable for bifold doors. They are made of stainless steel, and are resistant to breakage and wear for long-term usage. They have a large capacity for load bearing to support the weight of your doors and are easy to install. This nylon roller guide for the top was designed to replace bi-fold door panels up to 30 pounds. It is compatible with aluminum profiles of System S1000. How to identify a damaged bifold door roller Bif