ACDelco Control Arm Bracket - 20771901 Part #: 20771901 Line: ACD ACDelco Control Arm Bracket 2 Year LIMITED WARRANTY Material: Steel Height (in): 3.200 Inch Length (in): 5.400 Inch Width (in): 4.800 Inch Mounting Hole Diameter (in): 0.492 Inch Mounting Hole Diameter (mm): 12.5mm Show More Show Less