* Packaging: 4 pieces per set.

* Plastic: Made of high quality PC material which increases resistance to higher temperatures, I.D. and O.D. sizes clearly imprinted on ring.

* Aluminum: CNC-machined from 6061 billet aluminum for extreme accurcy, I.D. and O.D. sizes clearly engraved on ring.

* Eliminates vibration and enhances driving performance by filling the gap between the wheel hole and hub.

* Colored hub rings are available.

* O.D. and I.D. are measured in Millimeters below.