Product care, regular vehicle cleaning of dirt, grime or salt twice a month, year round. Appling a high-quality wax to help protect and maintain the finish of the product is recommended. Use only non-abrasive automotive wax. Use of any soap, polish or wax that contains an abrasive is detrimental and can scratch the finish leading to corrosion. Do not use harsh cleaners or chemicals that could damage the finish. Failure to keep your product clean may result in pitting and or peeling. Wheel Diameter (IN): 16 Inch Design: 10 Spoke Finish: Gloss Color: Black Material: Plastic (Acrylonitrile Butadiene Styrene ABS) Compatible With Steel Wheels: Yes Retention: Snap-On Factory Center Fits In Cover: No Quantity: Set Of 4