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Bifold Door Roller Replacement Suitable for bifold doors These rollers are constructed of stainless steel and resist wear and breakage for long-term use. They have a large capacity for carrying the weight of your doors 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 can be used with System S1000 aluminium profiles. How to identify the broken roller on a bifold door Bifold doors are a great solution for saving space in close