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Bifold Door Roller Replacement These rollers are suitable for bifold doors. They are made from stainless steel, and resist breakage and wear for long-term usage. They have a strong capacity for carrying the door's weight, and are easy to set up. This top-quality nylon roller guide was designed to be used as a replacement for bi-fold door panels that weigh up 30 pounds. It is compatible with aluminum profiles from System S1000. How to identify a damaged bifold door roller Bifold doors are a