Feature: Made of qualified aluminum alloy, solid, rustproof, and durable. Unique black round shape with spider pattern, you will like it. Add more individuality to your bicycle, cool and fashionable. Great accessory for cycling enthusiasts. Easy to install and remove, great accessory for your cycling. Outer diameter is 31.8mm (vertical cover diameter), suitable for 28.6mm fork pipe. Specification:Condition: 100% Brand New and High QualityMaterial: Aluminum AlloyColor: BlackWeight: Approx. 24gPacking List:1 x Bike Headset Cap