These are the optional RPM Rear A-Arms for the Associated SC10 and T4. 

FEATURES: Black in color Plastic constrution

INCLUDES: (2) Rear A-Arms (2) 3x5mm phillips round head screws

REQUIRES: Installation onto the Team Associated SC10 or T4

SPECS: Length: 4.06" (103mm) Width: 1.46" (37mm) Thickness: 0.30" (7.5mm)