bearing
Ball material: Black ceramic
Number of balls: 7
Bearing size: 8x22x7mm
Suitable for speed over stakes, speed skating, brushing, flat bottom fancy, skateboarding, etc.
High temperature resistance: The ceramic balls have a low coefficient of thermal expansion and will not cause the bearing balls to expand due to temperature in high temperature environments.
High rotational speed: Ceramic balls have oil-free self-lubricating properties, and ceramic balls have a small coefficient of friction, so ceramic has a high rotational speed.