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Bifold Door Roller Replacement These rollers are suitable for bifold doors. They are made from stainless steel, and resist breaking and wear for a long time. They have a high capacity for carrying the door's weight, and are easy to install. This nylon roller guide for the top was designed to replace bi-fold doors panels that weigh up to 30 pounds. It is compatible with Aluminium System S1000 profiles. How do you identify a broken bifold door roller Bifold doors are an ex