Description: High quality anodized aerospace aluminum Wheel Spacer and Adapters With Machine pressed Wheel studs matching lug nuts with specifications as described below . -Included Lug Nuts -6x5.5 Convert to 6x5.5 -Quality:4 pcs -Center bore: 108mm -Thread Pitch: 14 x 1.5 -Total Thickness:1.5 Inch -Comes with everything needed to install wheels onto spacer (additional lugs may be required to install spacer onto vehicle) -Professional Installation is Highly Recommended (No Instruction Included)