10pcs Window Pulleys Silent Bearing Fitting Tools Zinc Alloy Wheels U Groove Heavy Duty Sliding Door Roller Track Hardware

Door Locks. Zinc Alloy Material]: Made of high-quality zinc alloy materia with high hardness and excellent wear resistance. Capable of withstanding the weight of plastic steel doors, it is not easily deformed or worn out during long-term use, providing reliable support for the stable operation of plastic steel doors. Double groove wheel/double flat wheel design: The unique double groove wheel and double flat wheel structure can accurately fit with the plastic steel door track, disperse the weight of the door, and reduce frictional resistance. When opening and closing the door, the roller rolls smoothly without any jamming or deviation, making the opening and closing of the door more effortless and smooth, reducing the noise during opening and closing, and improving the user experience. Suitable for 88 type plastic steel door: Designed specifically for 88 type plastic steel doors, with precise dimensions, it can perfectly adapt to the corresponding door body and track without the need f