Bones Swiss Ceramic bearings are simply the best skate bearings out there today. Pro Skaters use them, and there's a reason - they're the best. There are the strongest, fastest, smoothest and most durable bearings in existance.

Specifications:

• Solid High Purity Silicon Nitride Ceramic Balls
• Fully Serviceable
• Removable High Speed Nylon Ball Cage
• Removable Non-Contact, Frictionless Rubber Shield
• Lubricated with Low Viscosity Bones Speed Cream
• Fastest Speed and Acceleration
• Lowest Friction, Longest Roll
• Lightest Weight
• Bones Skate Rated™ Design & QualityBones Swiss Ceramics use ceramic balls, instead of polished steel like everyone else. The Ceramic balls are harder, lighter than steel, stronger, and roll with less friction. This means you'll get going fast quicker, you'll have a higher top speed, and you won't need to replace your bearings as often due to flat spotting of soft metal balls and chewing up the raceways inside of the bearing.

  Bones Ceramics are also easier to clean - they come lubricated with Bones Speed Cream and are easy to pop open and clean. The bearings come with instructions on how to care for them, and the Bones web site has help as well.