1. Material: alloy + PA composite material
2. Specifications: 4-pack
3. Built-in rubber ring to prevent air leakage, maintain tire air seal and extend tire life
4. Clear markings, 3D epoxy resin
5. Waterproof, rust-proof, corrosion-resistant, oxidation-resistant, stable and durable
6. Diameter: 8mm
7. Dimensions: 10x12mm