These are the 3mm Diff Balls (14pcs) For the Team Durango DEX210 1/10 Electric 2WD Off Road Buggy (TDRC0010) FEATURES: Steel construction INCLUDES: Fourteen diff balls SPECS: 3mm COMMENTS: This is a standard part for DEX210 1/10 Electric 2WD Off Road Buggy (TDRC0010) 5/10/12 pjw ir/jxs