RollerBones Precision Bearings are Skate Rated, precision 608 bearings made to Skate One specifications. They have a removable rubber shield on one side, a removable metal shield on the other, a high speed molded ball retainer, precision ground and super-finished hardened chromium steel races and balls, and come pre-lubricated with Speed Cream... twice the performance and half the price you would expect. Available in 8mm only, 16 pack.