Fe Clip-on wheel weights: 1) Material: steel, lead-free to comply with European standard 2) Used on passenger car steel wheels 3) Clips can be used more than 10 times 4) ZN plated and then Nonpoisonous Coating,(after that polymer coated if ordered) Salt-spray tested to resist corrosion for more than 48 hours. 5) All specifications for passenger cars from 10 to 60grams available