1. Aluminum alloy material, strong and durable
2. Easy to install, no rust
3. Applicable models: for Xiaomi M365 / PRO
4. Material: aluminum alloy
5. Inner diameter: about 29.3mm
6. Size: about 11.8 x 7.6cm
7. Weight: about 470g
8. Description: only the folding device, without other items in the picture