General description Made of high-quality steel and ceramic, these 16 miniature high-speed bearings are designed for roller skating and skateboarding. They operate with low noise and are reliable, ensuring a smooth experience. The ceramic ball bearings offer better corrosion resistance and rarely require lubrication, making them a great choice for performance and longevity. Technical specifications Size: 11.7 x 8.5 x 2.2 cm Material: Steel + Ceramic Package Contents 16 x Bearings Other information