World Champion ACER Racing 10x15mm Ball Bearings 5 pack.  These are 5 pieces 10x15x4mm ball bearings also known as a size 6700 bearing, TRAXXAS 5119 and Traxxas 4612 size. HSR inner cage technology for constant performance at high speeds.  Sealed on both sides for superior protection against the elements and lubed with 100% synthetic ACERGoo. 

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