ABS plastic. The durable ABS center cap is corrosion-resistant. Wheel hub center caps are designed to improve the appearance of your wheel hub and also keep the end of your hubs clean, making them easier to maintain. Size: Outer Diameter: 180mm (7.09 inches), Total Height: 40.1mm (1.58 inches). Please use a digital caliper to check your original cap dimensions if you are not sure. Fitment: These center wheel caps are compatible with C806805-1, C108015-16B01, C806806. For many kinds of vehicles. Important size: OD 7.09 inches. Please check the size with your original one. For larger or smaller sizes, you can find them in our shop. Easy installation: Simply remove your old caps and click the new ones into place for a fresh look. You can attach a new logo sticker to it, giving your car a refreshed appearance. Package: Set of 4 replacement rim center caps. Snap them on for a cleaner look and to help keep dirt and debris out of the hub area.