Nickel coating on the surface, not easy to rust or corrode. Our mirror holder clips with soft silicone pad inside, effectively protect the glass from friction, make the glass more fit and tight. Features: Color: Silver Material: Zinc alloy. Dimensions: As shown in the photo Number: 4 Package Included: 4 x Glass Clamp Clips Note: 1. Please allow 0-1cm errors due to manual measurement. 2. Due to the differences between different monitors, the picture may not reflect the actual color of the item. Thank you very much!