Adequate Quantity: The package includes a total of 20 pcs 1 inch nylon roller ball transfer bearings. This quantity is sufficient for most industrial or commercial applications, providing reliable backup for ongoing needs. Ideal Size: The ball casters measure approximately 1 inch in diameter, with a mounting hole diameter of about 0.2 inches (6 mm), and a load capacity of approximately 400 lbs. This size offers a balanced design that is easy to install and suitable for a wide range of uses without compromising performance or functionality. Quality Material: The roller ball bearings are constructed from stainless steel and nylon, offering durability, resistance to wear, smooth surface finish without burrs, corrosion resistance, and quiet operation. 360 Degree Rotation: These 1 inch nylon roller ball transfer bearings provide full 360-degree rotation, allowing multidirectional movement and smooth object transfer, which enhances operational efficiency in various settings. Wide Use: These conveyor rollers can be easily installed on a variety of lightweight furniture and equipment such as shelves, chairs, serving tables, cabinets, drawer boxes, desks, and table saws. Color: Silver & White Material: Nylon + Metal Size: Diameter: 2.54 cm Package Contents: 20 x 1 Inch Roller Ball Note: Light reflection and differences in display screens may cause slight variations between the color shown in the image and the actual product. Measurement may vary by up to 1-3 cm due to manual measuring.