European universal O shape:

DIN19516 certificate

1. Eco-friendly UF material, anti-scratch,,sturdy & durable

2. 25°fast reaction slow lose tech

    No noise, not pinching hand,not disturbing sleep

3. Patented one button quick release for easy cleaning

4. Comfortable ergonomic design without causing 

    leg aches after long sitting

5. Long lifetime,100,000 times` pressure test

6. Solid fastening, no shaking

7. Excellent nonslip base, stainless steel bolt

8. 2.1/2.55kg(accessories included)