World Champion ACER Racing 10x15mm Ball Bearings.  These are 10x15x4mm ball bearings also known as a size 6700 bearing. HSR inner cage technology for constant performance at high speeds and 100% synthetic Made in USA ACERGoo lubrication for cooler, smoother, and faster operation.  Sealed on both sides with removable seals for superior protection against the elements.  ABEC 5 super high precision.

Price is for 10 pieces as shown