AccuWheel ACHR73-5615 Wheel Hub Centric Rings (73.00mm OD to 56.15mm ID) - Pack of 4 pcs Hub Ring Inner Diameter (Vehicle Hub Size): 56.15mm Hub Ring Outer Diameter (Wheel Bore Size): 73.00mm Made out of High Quality Poly Carbon Plastic. They will not corrode or melt in a regular condition Designed to Eliminate Vibrations caused by Custom Wheels not centering correctly onto vehicle's hub Please see Product Description section below for more Vehicle Compatibility