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Bifold Door Roller Replacement Suitable for bifold doors They are constructed of stainless steel and resist break and wear for long-term use. They have a large load-bearing capacity to support the weight of your doors and are easy to set up. This nylon roller guide for the top was designed to replace bi-fold doors panels that weigh up to 30 pounds. It fits aluminum profiles from System S1000. How do you recognize a broken roller on the bifold door Bifold doors are an excellent stor