1）Back: nylon+fiberglass frame, double mesh

2）Lumbar support: nylon, height adjustable
3）Armrest: fixed PP armrest
4）Cushion: Californian fireproof high-density molded foam, 12mm plywood inside, elastic cloth cover
5）Mechanism: Single degree locking system
6）Class 3 gas lift
7）Base: High quality 340mm five star nylon feet
8）Castors: 60mm PU wheel (black)