1. Material: aluminum alloy + resin gel 2. Application: dustproof, tire protection 3. Applicable models: general purpose 4. Mainly made of materials, with strong metallic texture and anti-corrosion and anti-oxidation ability 5. General purpose, anti-leakage, anti-theft, effectively protect tire driving safety 6. Size: height 16mm, diameter 12mm 7. Weight: about 15g/set 8. Note: black model without pattern