Thickness (in):0.500 in. Center Bore Diameter (in):3.070 in. Center Bore Diameter (mm):77.98mm Lug Nuts Included: No Lug Bolts Included: No Wheel Studs Included: No Wheel Spacer Material: Aluminum Quantity: Sold individually. These Allstar Performance aluminum wheel spacers are designed to increase track width, reducing wheel offset for better overall performance.