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Bifold Door Roller Replacement Suitable for bifold doors, these rollers are made from stainless steel and resist wear and breakage for a long-term use. They have a large capacity for carrying 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 to 30 pounds. It is compatible with aluminum profiles from System S1000. How do you identify broken rollers on a bifold door Bifold doors are ideal for saving s