Materials:
1. Backrest: Heatless Korea mesh(KM-13)
2. Seat: Heatless Korea mesh(KM-13)
3. Base: Polished aluminum star base.
4. Castor: Black nylon castors
5. Lumbar cushion: S shape abric with sponge.
6. Lumbar support: Chromed aluminum.
7. Armrest: PU cover

Functions:
1. Mechanism: Wire-controled Synchronized, multy-angle tilt lock. Backrest tension adjustable.
2. Lumbar cushion: Adjustable(up & down)
3. Seat height: Adjustable(up & down)
4. Armrest: Height adjustable, left and right twistable