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Bifold Door Roller Replacement Suitable for bifold doors They are constructed from stainless steel and resist wear and breakage for a long-term use. They have a high load-bearing capacity to support the weight of your doors and are easy to install. This nylon roller guide for the top is designed to replace bifold doors panels that weigh up 30 pounds. It is compatible with aluminum profiles from System S1000. How do you recognize a broken bifold door roller Bifold doors are an