Fuel Wheels 6 Lug Custom Center Cap Chrome (Set of 1) # 1001-58 1001-65 Cap M-447 ST-MQ804-150 Diameter: 5 & 5/8 inches across the back of the cap. Part number: 1001-58 1001-65 CAP M-447 ST-MQ804-150 Finish: Chrome Height: 1 & 7/8 inches