https://king-wifi.win/wiki/10_....Things_Everybody_Has
Bifold Door Roller Replacement These rollers are ideal for bifold doors. They are made of stainless steel, and are resistant to breaking and wear for long-term usage. They have a large capacity for load bearing to support the weight of your doors and are easy to install. This nylon roller guide for the top was designed to replace bifold doors panels that weigh up to 30 pounds. It is compatible with System S1000 aluminum profiles. How do you identify a broken roller on a bifold door