These are the Team Durango Molded Insert and Cross Shafts. FEATURES: Fits the front, center and rear differentials of all 1/8 scale Team Durango models Replaces steel cross shafts and inserts in the differentials- giving a total weight saving of 22.2g per vehicle Constructed of molded plastic INCLUDES: Three Cross Shafts Twelve Molded Inserts SPECS: Cross Shaft Diameter: 0.138" (3.5mm) Cross Shaft Length: 1.06" (27mm) jxs 12/04/12 ir/jxs