This is the Ball Bearing: 2pcs (5x13x4mm) For the Team Durango 1/10 Electric Off Road Buggies FEATURES: Steel construction INCLUDES: Two ball bearings SPECS: Thickness: 5mm Inner diameter: 8mm Outer diameter: 13mm COMMENTS: This is a standard part for DEX410 1/10 Electric 4WD Off Road Buggy DEX410R 1/10 Electric 4WD Off Road Buggy DEX210 1/10 Electric 2WD Off Road Buggy (TDRC0010) DEX410v3 1/10 Electric 4WD Off Road Buggy (TDRC0120) DEX410Rv3 1/10 Electric 4WD Off Road Buggy 5/11/12 pjw ir/jxs