1. Material: aluminum alloy cap + engineering plastic expansion body + hexagonal screws
2. Applicable models: most of the market mountain bike, road bike, folding bike
3. Technology: laser
4. Lightweight design, easy to ride without burden
5. Simple installation, easy to use
6. The cover is made of aluminum alloy, wear-resistant and durable
7. Inside diameter: 24-35mm
8. Weight: 20.8g/pair