1. Material: aluminum alloy
2. Applicable models: for Ninebot F20/F25/F30/F40
3. Circulates air around the brakes to help dissipate heat
4. Easy to install and use
5. Made of aluminum alloy, high strength and good hardness
6. Wear-resistant, not easy to rust, long service life
7. Weight: 70 grams
8. Note: Only the brakes will be shipped, nothing else!