Upgrade Option: This cap is 100% aluminum and balances perfectly into the center of our wheels. Each cap features a smaller logo accented by 8 surrounding fasteners. This cap fits into wheels with a 4 prong system that securely fastens the cap into the center of the wheel. This cap is recommended for special painted finishes as it inserts more softly into the center of the wheel. MSRP: $30 per cap.