Shiver Abec 9 Pro Series Bearings in a Revolver casing with foam inserts | Fully integrated washer and spacer prevents over-tightening and protects bearings. Shiver has acquired the exclusive rights in the skateboarding industry to use Pro One’s lubricant that is used by NASA. Forget the Abec ratings, they actually mean almost nothing. The lubricant is the difference maker. Shiver’s bearings are manufactured to the highest standards and utilize Pro One’s patented lubricant. The lubricant works with friction and heat - the more you ride, the better they spin!