Advantages
1. up and down PP headrest
2. PA backrest with recline angel between 95-125°
3. PA lumbar support with aluminum, nylon backrest
4. PA sliding seat with full mesh
5. functional mechanism with wire control button
6. 3D armrest
7. class 3 air spring, can pass SGS text
8. PA base with PU castors, pass 1300kg static pressure