TwoLions High Rev 608RS Hybrid Black Ceramic Bearings for Inline Skate or Skateboard or Scooter (Pack of 8) Price: $21.00 (as of 27/05/2021 01:58 PST- Details) & FREE Shipping.

1. Hybrid Ceramic bearings,do not need Grease,it have special rustling sound,Super High Speed,Long Spin time.
2.Rolling elements:7 Black Ceramic Beads(Si3N4), High Temperature and Corrosion Resistance,Abrasion resistance,High Revs.
3.Size: 8 * 22 * 7 (Inner * Outer * Height) / Unit: mm