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Bifold Door Roller Replacement These rollers are ideal for bifold doors. They are made of stainless steel, and resist breakage and wear for a long time. They have a large capacity for carrying the weight of your doors, and are easy to install. This top-quality nylon roller guide is designed to be used in bi-fold door panels that weigh up 30 pounds. It is compatible with Aluminium System S1000 profiles. How do you identify the broken roller on a bifold door Bifold doors a