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Bifold Door Roller Replacement These rollers are suitable for bifold doors. They are made from stainless steel, and resist wear and breakage for long-term usage. They have a strong 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 that weigh up 30 pounds. It fits aluminum profiles from System S1000. How do you recognize a damaged bifold door roller Bifold doors are an exc