ZD Racing Rc Car Parts-6390 Aluminium Alloy Upper Suspension Arm It's ZD racing 16421-V2 1/16 brushless rc car replacement part aluminium alloy upper suspension arm,its metal material body will be strong enough to face the crash. . Parts NO:6390 . material:aluminium alloy . (PS:It's suitable for ZD racing 16421-V2 1/16 9048/9051/9053/9055.) . Package Included: 2 x aluminium alloy upper suspension arm