World Champion ACER Racing 8x19x6mm Ceramic Ball Bearings.  This is a 8x19mm ceramic ball bearing also known as a size 698 ball bearing. Diamond polished Silicon Nitride (Si3N4) Balls, HSR cage technology and sealed on both sides. Lubricated with lightweight and 100% synthetic ACERGoo lubricant instead of for super smooth action.  ACER Racing lightweight ceramic ball bearings last longer and spin faster.

Price is for two bearings