Moto ceramic pearls skate bearings pack of 16moto ceramic pearls are the ultimate in ceramic skate bearings the advantages of moto ceramic pearls over other ceramic bearings are achieved by using the finest ceramic balls that are rounder harder smoother lighter and more durable the ceramic also reduces friction improved power transfer and increases bearing longevityas with all moto bearings the ti nite races and shields are optimized for very low friction and maximum protection again