The Cerbec ceramic balls are much lighter, harder, stronger, waterproof, and longer lasting than the finest steel balls.
With these bearings you can accelerate faster, roll faster and farther and they will resist dirt and moisture better.

Features 1 non-contact, removable rubber shields allow easy cleaning High speed nylon ball retainer for greater strength and speed Skate Rated™ clearances, tolerances, materials and lubricant provide the best performance and durability possible.