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for bifold doors, these rollers are made of stainless steel and resist wear and breakage for a long-term use. These rollers are strong enough to support your doors' weight and are easy to install. This top-quality nylon roller guide is designed to be used in bi-fold door panels weighing up to 30 pounds. It is compatible with Aluminium System S1000 profiles. How do you identify the broken bifold door roller Bifold doors are a great storage solution for closets but just like any other door, they can cause problems after prolonged use. Most of these iss