TwoLions High Speed 608RS Stainless Steel Hybrid Black Ceramic Bearings for Inline Skates or Skateboard or Scooter or Quad Roller Skates Pack of 8

Use For: Inline Roller Skates Shoes,Speed Inline Roller Skating,Free Line Skate (Drift Board),Skate board,Long Board,Scooter,Quad Skate, Bearing Type:Hybrid ceramic bearing, Material: Bearings Ring: Stainless Steel Beads: 7 Black Ceramic Beads (Si3N4), Size: 8 * 22 * 7 (Inner * Outer * Height) / Unit: mm, 1.Hybrid Ceramic bearings,do not need Grease,it have special rustling sound 2.Super High Speed,Long Spin time 3.Stainless , do not rust