The Bones Swiss Bearings.

• Single, removable, non-contact rubber shield allows easy cleaning and low friction.
• High speed nylon ball retainer provides added strength and speed.
• Pre-lubricated with Speed Cream racing lubricant
• Skate Rated; clearances, tolerances, materials and lubricant provide the best performance and durability possible.
• Best selling high end skate bearing in the U.S.A.