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 spare availability. 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 supports versatile use without installation difficulties or usability limitations. Quality Material: The ball bearing rollers are constructed from stainless steel and nylon, offering durability, wear resistance, smooth finish, 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 transfer of items, enhancing operational efficiency. Wide Use: These conveyor rollers are suitable for various applications and can be easily installed on light-duty furniture and equipment such as shelves, chairs, tables, cabinets, drawer boxes, desks, and table saws. Color: Silver and White Material: Nylon and Metal Size: Diameter: 2.54 cm Package Contents: 20 x 1 Inch Roller Ball Note: The package includes only the items listed above. Light reflection and display differences may cause slight variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.