Which is better for sliding door pulleys

Which is better for sliding door pulleys?
Sliding doors, we all know that it is more decorative than traditional doors, and many people will use them in small spaces such as kitchens or bathrooms, not occupying an inch of space.
However, many people have forgotten the importance of the pulley when they installed it, only to care about the beauty of the door. So is the pulley made of stainless steel or plastic? The master thinks that the sliding door pulley is still not good for buying plastic. It is actually a display.
Sliding doors are not only the decorative nature of the door, but also the quality of its hardware, including the important pulleys. At present, the pulleys on the market are roughly classified into three kinds of materials: plastic, metal, and glass fiber, and many of them are stainless steel machining.