608 ceramic Si3N4 ball bearing High speed hybrid black ceramic Si3N4 balls bearing ABEC-9 Skateboard Bearings for Blenders, Skateboards,Inline Skates,Scooters,Spinners,Roller -Material: 7 ceramic Si3N4 balls, Chrome steel ring, more durable, move smooth, low noise, high speed 608 ceramic Si3N4 ball bearing Deep Groove Ball Bearings Double Metal Seals ABEC-9 7 ceramic Si3N4 balls, provide super rotate speed and super abrasion resistance, in skating bearing the most important and abrasive wear most, Ceramic Si3N4 balls can Supper resistance to wear in the roller staking bearings, Chrome Steel rings make 608 hybrid ceramic ball bearings more economical and practical than full Ceramic Skateboard Bearings ABEC-9 precision higher speed and creating lower friction，Special structure designed for skateboarders, 608 hybrid ceramic ball bearings ABEC-9 Skateboard Bearings made of ceramic Si3N4 balls and Chrome steel ring for durability, resistance to corrosion and rust metal shields on both sides keeping lubricant in and contaminants out. -Package Included: 16 pcs 608 ceramic Si3N4 ball bearing ABEC-9 Skateboard Bearings -Size: 608 ceramic Si3N4 balls Skateboard Bearings 8x22x7mm -Revolutions Per Minute (RPM) limit of 34,000 without grease lubrication 608 hybrid ceramic ball bearings Deep Groove Ball Bearings Double Metal Seals 608 high speed Skateboard Bearing ABEC-9 precision higher speed and creating lower friction，Special structure designed for skateboarders -Wide Application: Hybrid Ceramic Skateboard Bearings 608 ceramic Si3N4 ball bearing are used in skateboards, roller skates, inline skates, scooters, wheel bearings, high speed Skateboard Bearings If these Hybrid Ceramic Skateboard Bearings 608 ceramic Si3N4 ball bearing High Speed ABEC-9 Skateboard Bearings don't live up to your expectations, please let us know. You take NO RISK when you purchase with us. 608 hybrid ceramic ball bearings High Speed ABEC-9 Skateboard Bearings You'll probably order MORE