Features: Rubber sealed to help prevent contaminants from entering and retain lubricant. Made of high-quality metal for low noise and long service life. Offers good wear resistance and high stability. The bearing provides low friction and supports high-speed operation due to its smooth surface and compact design. Suitable for small hobby projects with 5mm shafts or rods. Commonly used in skateboard wheels, inline skates, caster wheels, scooter wheels, and various industrial applications. Package includes 10 ball bearings, ideal for multiple projects or as replacements for worn bearings. Specifications: Material: Metal Outer Diameter: Approx 16mm Inner Diameter: Approx 5mm Width: Approx 5mm Note: Please allow 1-3cm error due to manual measurement. Ensure you are comfortable with this before purchasing. Due to differences between monitor displays, the image may not accurately reflect the actual color of the item. Package Includes: 10 x Ball Bearings