This is the Big Bore Shock Springs: 45mm Black (49GF/MM) (2pcs) For the Team Durango 1/10 Electric Off Road Buggies and Short Course Truck FEATURES: Steel construction INCLUDES: Two shock springs COMMENTS: This part set is optional for DEX410 1/10 Electric 4WD Off Road Buggy DEX410R 1/10 Electric 4WD Off Road Buggy DESC410R 1/10 Electric 4WD Short Course Truck (TDRC0130) 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 5/23/12 pjw ir/jxs