Heavy-Duty Build: Trolley assembly made with hot-rolled carbon steel for impact resistance. Galvanized for rust resistance and smooth operation. Bearings and pins are securely welded to ensure stable performance, strength, and durability. Operates Steadily: Equipped with standard deep groove ball bearings for smooth, quiet operation. Precision welding ensures accurate positioning and improved stability during use. Unique Design: Bolt is hidden within the fastening groove to prevent obstruction in the channel. 4-wheel heavy-duty trolley assembly with silent wheels for easy movement. Simply insert the wheel into the pillar channel for immediate use. Style: A - wheels with rings. Color: Silver. Material: Steel. Package Contents: 2 x Silent Trolley Note: Other items not included. Light reflection and differences in display settings may cause slight color variations between the image and the actual item. Dimensions may vary by up to +/- 1-3 cm.