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Bifold Door Roller Replacement These rollers are ideal for bifold doors. are made of stainless steel, and resist wear and breakage for a long time. They have a large capacity for carrying 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 can be used with aluminum profiles from System S1000. How to identify broken rollers on the bifold door Bifold doors a