ball bearing
Bearings
Features:
1. Black Ceramic ball Skates Bearings 608.
2. Precise and High Speed 6 balls innovative design, faster and more stable.
3. Anti-rust ,self-lubricated si3n4 black ceramic balls.
4. Excellent for professional speed Skating ,inline skates competition.
5. Amazing fast and stable! Born for competition!
6. High precision Si3n4 ceramic balls can bear higher temperature, when the bearing is under very fast speed rotation,the balls won't expand.
So that it can help to ensure a faster speed and longer life of the bearing.