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Bifold Door Roller Replacement For bifold doors, these rollers are made from stainless steel, and are resistant to wear and breakage for a long-term use. 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 bifold doors panels up to 30 pounds. It is compatible with aluminum profiles of System S1000. How to identify a broken roller on the bifold door Bifold doors are a g