The Gorilla Black Wheel Center Hub Cap has a 4.25" outer diameter and is made of steel. It features a push-thru cap style with a closed-end design, providing a secure fit on your vehicle's wheel hub. The black color adds a sleek and stylish touch to your wheels, enhancing the overall look of your car or truck. This product is perfect for those looking to customize their wheels with a durable and high-quality center cap from a trusted brand like Gorilla Automotive Products.