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
