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Bifold Door Roller Replacement These rollers are ideal for bifold doors. They are made from stainless steel, and are resistant to wear and breakage for long-term use. They are sturdy enough to support your doors' weight and are easy to install. This nylon roller guide for the top is designed to replace bi-fold door panels that weigh up to 30 pounds. It fits System S1000 aluminum profiles. How do you recognize a broken bifold door roller Bifold doors can be ideal for saving space in closets. However,