Legendary Original BONES® Swiss bearings are the optimum combination of Bones Skate Rated™ design and Swiss precision manufacturing creating the standard by which all other bearings are measured. For more than 24 years preferred by the world’s top professional skaters. Proven, professional competition-grade speed and durability make Bones Swiss normally last several times as long as ordinary ABEC rated bearings. Removable synthetic high speed ball retainer, shielded one side allows for complete cleaning and relubrication, hardened steel balls, deep grooved speed races, high temperature, low viscosity lubricant. Available in 7mm (627) or 8mm (608) size package of 16 precision sealed bearings.