Features Smooth Operation: Expertly designed with a quadruple wheel configuration, this trolley roller guarantees an ultra-smooth sliding experience, enhancing door movement with minimal noise output. Robust Construction: Crafted with precision, the rolling bearing structure is a product of meticulous CNC machining and robust welding, providing a solid, reliable foundation for your sliding mechanisms. Versatile Application: This rolling bearing accessory is a universal solution, catering to a vast array of movable panels — from domestic sliding doors and wardrobes to heavy-duty iron portals and industrial automatic systems. Superior Materials: Constructed with high-grade carbon and stainless steel, our trolley assembly resists erosion and rust, ensuring longevity and consistent performance in varied environmental conditions. Installation Simplicity: With its lightweight design and compact size, the trolley roller can be effortlessly installed in minutes, streamlining the setup process without the need for specialized tools or expertise. Features: 1. Smooth Sliding: 4 wheel design ensures smooth rolling performance with good stability, and the operation is very safe and easy with low noise. 2. Good Structure: Adopting rolling bearing, the trolley assembly has been through fine welding and CNC crafting to form highly sturdy structure. 3. Extensive Uses: Allows for wide application on home movable doors, wardrobe, large iron doors, curtains, automatic equipment components, etc. 4. Steel Material: The utilization of premium carbon steel and stainless steel materials enables greater durability against rusting and erosion. 5. Easy to Install: Comes with a compact size and a light weight as well, the trolley roller is very convenient to install within several minutes. Specification: Item Type: Trolley Assembly Material: Carbon steel, stainless steel. Color: Silver Use: It can be used for home movable doors, wardrobe, large iron doors, curtains, automatic equipment pulley components, and factory track pulley.  Package List:1 x Trolley Assembly Package List 1 x Trolley Assembly