Genuine OEM Audi Shock Absorber Dust Cap, part number 4D0412137C. This cap is designed to protect the shock absorber shaft and seal from road dust, dirt, and moisture. It sits over the top of the shock absorber, forming a protective barrier. Made from durable rubber, it measures approximately 80mm in length. Using a genuine OEM dust cap ensures a precise fit and material quality, crucial for effective protection and extended shock absorber life.