These are the Super Heavy Duty Drive Shafts for use with the HPI Savage XL (HPID54**). FEATURES: Steel construction Black in color YOU WILL RECEIVE: Two Driveshafts REQUIREMENTS: Installation into the HPI Savage XL SPECIFICATIONS: Length: 132mm (5.20") Diameter: 5mm (0.20") COMMENTS: For Super Heavy Duty Axles, order HPIC9692 cnh 6/5/08 ir/jxs &